List of islands of Ireland

This is a list of islands of Ireland. Ireland is itself an island, lying west of the island of Great Britain and northwest of mainland Europe. Islands are listed clockwise around the coast, starting from the north-east.

This article is about offshore islands. For lake and river islands, see List of inland islands of Ireland.

The Hebrides off Scotland and Anglesey off Wales were grouped with Ireland ("Hibernia") by the Greco-Roman geographer Ptolemy,[1] but this is no longer common.

Largest islands by area and population
English name County Area
Acres		 Population
2011		 Area
Rank		 Population
Rank		 Causeway/Bridge
Great Island Cork 6115 >13000[2] 4 1 Yes
Achill Island Mayo 35283 2569 1 2 Yes
Gorumna Galway 5871 1055 5 3 Yes
Inishmore Galway 7635 845 2 4 No
Valentia Island or Valencia Island Kerry 6371 665 3 5 Yes
Lettermore Galway 2254 548 12 6 Yes
Arranmore or Aran Island Donegal 4335 514 7 7 No
Inch Island Donegal 3425 448 10 8 Yes
Inisheer or Inishere Galway 1400 249 17 9 No
Lettermullen or Lettermullan Galway 787 241 25 10 Yes
Bere Island or Bear Island Cork 4372 216 6 11 No
Clare Island Mayo 3949 168 8 12 No
Rathlin Island Antrim 3552 c.100 9 c.22 No

Total population of Irish offshore Islands

The number of people living on Irish islands decreased dramatically during the Irish famine and the period following it. Since then the trend on most islands has been a decreasing population until the 1950s and 1960s during which many islands were forcefully evacuated by the Irish Government as continuous bad weather meant that islanders were unable to travel to the mainland for several consecutive months. Of the remaining islands that were not evacuated, many of their populations have continued to dwindle ever since, with some seeing stabilisation or even a slight uptick in population during and after the Celtic Tiger.

The chart below shows the total number of people living on Irish islands throughout the years.

Historical population
YearPop.±%
184134,219—    
185129,314−14.3%
186127,948−4.7%
187126,571−4.9%
188129,226+10.0%
189126,149−10.5%
190125,446−2.7%
191124,700−2.9%
YearPop.±%
192621,662−12.3%
193619,926−8.0%
194618,665−6.3%
195117,488−6.3%
195616,118−7.8%
196114,473−10.2%
196612,899−10.9%
197111,737−9.0%
YearPop.±%
197910,866−7.4%
198110,869+0.0%
198610,409−4.2%
19919,569−8.1%
19969,280−3.0%
20028,884−4.3%
20068,983+1.1%
Source: Central Statistics Office. "CNA17: Population by Off Shore Island, Sex and Year". CSO.ie. Retrieved October 12, 2016.

Full table
English name Irish name[n 1] County Group/Location Area
Acres[n 2]		 Height
Metres[n 3]		 Population
1841[3]		 Population
2006[3]		 Connection to mainland Coordinates OS grid
 OS
map		 PDI ref
Rathlin Island Reachlainn Antrim North Channel 3552[4] 134 1010[5] c.100[6] Passenger ferry from Ballycastle 55°17′32″N 6°11′30″W D1452 61298
The Maidens or Hulin Rocks Na Maighdeanacha Antrim North Channel 0 None 54°55.7′N 5°43.6′W[7] D4612 1166440
Copeland Island Oileán Chóplainn Down North Channel 295 33[n 4] 31[8] 54°40′29″N 5°31′44″W J6083 1166534
Cannon Rock Down North Channel 54°24′28.7″N 5°21′59.6″W[9] J676531 —
Mid Island Down Strangford Lough 15 7[10] J566672 65848
Rough Island Down Strangford Lough 7 13[n 4] 4[11] Causeway accessible at low tide[12] J494689 66037
Reagh Island Down Strangford Lough 128 19[n 4] 14[13] Road J525650 66111
Mahee Island Inis Mochaoi Down Strangford Lough 177 27[n 4] 28[13] Road via Reagh Island J532640 66110
Wood Island Down Strangford Lough 23 8[n 4] 4[13] J510642 66116
Rainey Island Down Strangford Lough 40 10[13] J528631 65894
Sketrick Island Down Strangford Lough 41 11[13] Road J526625 65898
Trasnagh Island Down Strangford Lough 25 13[13] J536620 65899
Roe Island Down Strangford Lough 21 7[14] J542610 65896
Conley Island or Conly Island Down Strangford Lough 65 23[14] J529609 66233
Dunsy Island Down Strangford Lough 33 24[n 4] 6[14] J543590 66236
Islandmore Down Strangford Lough 122 18[n 4] 18[14] J541581 66241
Pawle Island Down Strangford Lough 50 12[15] J543573 66271
Simmy Island Down Strangford Lough 8 3[15] J531557 66274
Island Taggart Down Strangford Lough 77 15[15] J533547 66266
Castle Island Down Strangford Lough 113 37[n 4] 68[16] Road J511488 66882
Gores Island or Gore's Island Down Strangford Lough 99 30[n 4] 18[16] J521494 66883
Salt Island Down Strangford Lough 51 16[n 4] 2[16] J530502 66895
Rockabill Cloch Dábhiolla Dublin Irish Sea 0 0 53°36′N 6°0′W O321627 1165790
Colt Island Inis Coilt Dublin Skerries 7 13 0[17] 0 53°35′N 6°5′W O265612 17032
St Patrick's Island Inis Pádraig Dublin Skerries 15 12 0[17] 0 53°35′7″N 6°4′26″W O275612 17034
Shenick Island or Shenick's Island Oileán Sionnaigh Dublin Skerries 15 8 4[17] 0 53°34′20″N 6°5′1″W O268598 17033
Lambay Island Reachrainn Dublin Irish Sea 595 126 (Knockbane, and Tinian Hill) 89 6 53°29′30″N 6°1′0″W O3151 1166603
Ireland's Eye Inis Mac Neasáin Dublin Irish Sea 53 69 0[18] 0 53°24′19″N 6°3′49″W O2941 1166256
Bull Island or North Bull Oileán an Bhulla Dublin Dublin Bay c.740[19] 4 12 18 Road causeways 53°22′1″N 6°8′55″W O2337 57172
Dalkey Island Oileán Dheilginse Dublin Irish Sea 21 90[n 4] 8[20] 0 53°16′N 6°5′W O278263 16606
Kerragh Island Wexford Saint George's Channel 52°11′42″N 6°43′54″W
Begerin Island or Beggerin Island Beigéirinn Wexford North Slob 22[n 5] 5[n 4] 20 0 Road (no longer an island) T082251 53675
Tuskar Rock an Tuscar Wexford Saint George's Channel 4 0 52°12′10″N 6°12′26″W T2207 1166860
Saltee Island Great An Sailte Mór Wexford Saltee Islands 216 58 0 0 52°7′N 6°36′W X9597 1166651
Bannow Island Oileán Bhanú Wexford Bannow Bay 144[n 5] 81 24 0 Road (no longer an island) S819078 53760
Fota Island or Foaty Fóite Cork Cork Harbour 767 30[n 4] 209[21] Rail and road bridges (no longer an island) 51°53′57″N 8°17′53″W W7072 1166136
Great Island an tOileán Mór Cork Cork Harbour 6115[21] 91 9424[21] >12000[22] Rail and road bridges via Fota I; car ferry to Passage West 51°52′N 8°17′W W8069 1166543
Rocky Island an tOileán Carraigeach Cork Cork Harbour 3 3[21] Road bridge 51°50′N 8°18′W W792649 9407
Haulbowline Island Inis Sionnach Cork Cork Harbour 86[23] 20 222 16 Road bridge via Rocky Island 51°50′30″N 8°18′0″W W792654 1410428
Spike Island Inis Píc Cork Cork Harbour 98 24 202 0 51°50′N 8°17′W W8065 1166269
Inchydoney Oileán Inse Duine Cork Clonakilty Harbour 475 63 235 193 Road causeways (no longer an island) 51°36′7″N 8°52′34″W W4039 1166540
Rabbit Island Oileán Bhríde Cork Squince Harbour 18 19 17[24] 0 None W221315 13263
Fastnet Rock Carraig Aonair Cork Atlantic Ocean 24 0 0 51°23′3″N 9°36′1″W V8816 1165639
Cape Clear Island Cléire Cork Carbery Islands 1502 160 (Killickaforavane) 1052 125 Passenger ferries (Baltimore; Schull, seasonal) 51°26′N 9°30′W V9521 543
Sherkin Island Inis Arcáin Cork Carbery Islands 1248 101 (Slievemore) 1131 106 Passenger ferry from Baltimore 51°28′N 9°25′W W0225 13016
Spanish Island Cork Carbery Islands 134 34 26[25] 0 None W033275 13005
Ringarogy Island Rinn Ghearróige Cork Carbery Islands 951 44 597 88 Road bridge W0528 1166618
Inishbeg Inis Beag Cork Carbery Islands 370 37 335 8 Road bridge W0631 13298
Mannin Island Manainn Cork Roaringwater Bay 14 18 4[26] 0 None W016325 13298
Heir Island, Hare Island, or Inishodriscol Inis Uí Drisceoil Cork Carbery Islands 380 26 358 24 Passenger ferry (Baltimore–Schull; seasonal) 51°29′29″N 9°26′47″W V9928 129542
Calf Islands Na Laonna Cork Carbery Islands 77 (East)
62 (Middle)
63 (West)		 22 (East)
14 (Middle)
28 (West)		 19 (East)[27]

39 (Middle)[28]

21 (West)[28]

 0 V9626 1166289
Skeam East Inis Céime Thoir Cork Carbery Islands 50 19 29[27] 0 None W0029 12938
Skeam West Inis Céime Thiar Cork Carbery Islands 31 17 22[27] 0 None V987288 12939
Horse Island Oileán an Chapaill Cork Carbery Islands 154 39 137 2 V980301 13378
Castle Island Oileán an Chaisleáin Cork Carbery Islands 122 36 92[29] 0 V957294 13369
Long Island Inis Fada Cork Carbery Islands 341 31 336 5 V9228 13528
Whiddy Island Faoide Cork Bantry Bay 1001 50 729 22 Seasonal passenger ferry to Bantry 51°42′N 9°30′W V9650 8648
Chapel Island Cork Bantry Bay 16[30] 22[n 4] 4[31] 51°42′N 9°30′W V982498 8636
Ilnacullin, Garinish, or Garnish Garinis Cork Bantry Bay 36 34[n 4] 13 0 51°44′11″N 9°32′28″W V934548 8530
Roancarrigmore Róncharraig Mhór Cork Bantry Bay 3 6 0 0 51°39′10″N 9°44′50″W V791460 8731
Dinish Island Duínis Cork Bantry Bay 45 40[n 4] 13 0 Road bridge V684455 8805
Bere Island or Bear Island an tOileán Mór Cork Bantry Bay 4372[32] 273[n 4] (Knockanallig) 2108[32] 187 Car ferries from Castletownbere and Beal Lough 51°38′N 9°53′W V7044 1166542
Dursey Island Oileán Baoi Cork Atlantic Ocean 1403 252 198 6 aerial tramway 51°36′N 10°12′W V4841 8835
Inishfarnard Inis Fearn Ard[33] Cork Coulagh Bay 64 44 30[34] 0 51°42′38.4″N 10°1′32.2″W V604528 8787
Ormond's Island Oileán Urumhan Kerry Kenmare River 20 10 0[35] Causeway at low tide 51°49′35″N 09°44′52″W V792653 22944
Dinish Island Duínis Kerry Kenmare River 25 11[n 4] 11 0 51°50′50″N 09°39′12″W V859673 22930
Dunkerron Island East Oileán Dhún Ciaráin Thoir Kerry Kenmare River 22 5 15[n 6] 0 None[n 7] V876692 23121
Dunkerron Island West Oileán Dhún Ciaráin Thiar Kerry Kenmare River 30 5 15[n 6] 0 None[n 7] V869691 23122
Cappanacush Island[n 8] Oileán an Tí Kerry Kenmare River 19 11[n 4] 8[37] 0 None V854690 22947
Garinish Island Garinis Kerry Kenmare River 57 None 51°48′17″N 09°53′57″W V6892763122 22889
Greenane Islands Oileáin an Ghrianáin Kerry Kenmare River 22[n 8][38] 5 6[n 8][38] 0 None V853692 23022
Rossmore Island an Ros Mór Kerry Kenmare River 319 32 0[n 9] 6 Road bridge 51°49′35″N 09°48′12″W V758651 23166
Rossdohan Island Oileán Ros Dochan Kerry Kenmare River 134 35 [n 10] 0 Road bridge 51°48′10″N 09°51′55″W V712627 23165
Sherky Island Oileán Seirce Kerry Kenmare River 82 36 9[40] 0 None 51°47′24″N 09°53′58″W V686612 22909
Deenish Island Duínis Kerry Atlantic Ocean 122 144 0 0 51°44′13″N 10°13′09″W V466560 22214
Scariff Island an Scairbh Kerry Atlantic Ocean 366 252 0 0 51°43′47″N 10°14′53″W V445555 22224
Puffin Island Oileán na gCánóg Kerry Atlantic Ocean 125 159 0 0 51°50′N 10°25′W V3468 1166547
Little Skellig or Skellig Rock Little Sceilg Beag Kerry Skellig Islands 17 134[n 4] 0 0 51°46′N 10°32′W V270618 22406
Skellig Michael or Skellig Rock Great Sceilg Mhichíl Kerry Skellig Islands 44 186[n 4] 0[n 11] 0 51°46′N 10°32′W V2561 22405
Valentia Island or Valencia Island Dairbhre Kerry Atlantic Ocean 6371[41] 266 (Geokaun) 2886[41] 713 Road bridge, and ferry 51°54′N 10°21′W V3876 22439
Beginish Island Beag Inis Kerry Valentia Harbour 159 63 0 Ferry 51.93°N 10.30°W / 51.93; -10.30 (Beginish Island) 22439
Church Island Oileán an Teampaill Kerry Valentia Harbour 1 4 0 0 51.937°N 10.283°W / 51.937; -10.283 (Church Island) 101097
Lamb Island Oileán na nUan Kerry Valentia Harbour 5 23 0 0 51.94°N 10.29°W / 51.94; -10.29 (Lamb Island) 22156
Beginish Beiginis Kerry Blasket Islands 32 14 84 0 52°6′56″N 10°30′26″W V263988 22146
Great Blasket Island an Blascaod Mór Kerry Blasket Islands 1060 292 (Croaghmore) 153 2 52°6′N 10°32′W V259963 22578
Inishnabro Inis na Bró Kerry Blasket Islands 102 175 0[42] 0 52°3′28″N 10°36′32″W V2193 22580
Inishvickillane Inis Mhic Aoibhleáin Kerry Blasket Islands 171 135 3[42] 0 52°2′37″N 10°36′30″W V2191 22582
Tearaght Island an Tiaracht Kerry Blasket Islands 47 183[n 4] 0[n 12] 0 52°4′36″N 10°39′30″W V179948 22583
Inishtooskert Inis Tuaisceart Kerry Blasket Islands 186 172 0[42] 0 52°7′50″N 10°34′42″W Q2301 22581
Magharee Islands or the Seven Hogs Oileáin an Mhachaire Kerry Atlantic Ocean 32 (Illauntannig),
29 (Illaunimmil),
13 (Inishtooshkert),
9 (Gurrig),
6 (Reennafardarrig),
5 (Illaunboe)		 23[n 4] (Gurrig),
16 (Inishtooshkert),
12 (Illaunboe),
15 (Reennafardarrig),
15 (Illauntannig),
22 (Illaunimmil)		 0 0 52°19′N 10°2′W Q6022 1166527
Fenit Island an Fhianait Kerry Tralee Bay 439 12 315[43] Track (tombolo) 52°17′N 9°52′W Q720174 24367
Carrig Island Oileán na Carraige Kerry Shannon Estuary 231 6 105 10 Road bridge 52°37′17.59″N 9°4′15.74″W Q985481 23885
Tarbert Island Oileán Thairbirt Kerry Shannon Estuary 63[n 5] 20[n 4] 134 8 Roads (no longer an island) 52°34′21″N 9°22′30″W R075494 24189
Foynes Island Oileán Fainge Limerick Shannon Estuary 294 60[n 4] 83[44] 0 52°37′21.8″N 9°6′45.1″W R2553 1166539
Aughinish Eachinis Limerick Shannon Estuary 1066 21 140[45] Road bridges 52°37′17.59″N 9°4′15.74″W R2853 1166075
Green Island Oileán Uí Uainín Clare Shannon Estuary 15 7[n 4] 9 0 52°40′56.85″N 8°55′13.63″W R457591 7410
Dernish Island Clare Shannon Estuary 8[n 5] 14[n 4] 11[46] Road (no longer an island) 52°40′56.85″N 8°55′13.63″W R378595 104097
Inishmacnaghtan Inis Mhic Neachtain Clare Fergus Estuary 285 24[n 4] 12[46] Road 52°42′28″N 8°57′2.65″W R359623 6141
Feenish Fínis Clare Fergus Estuary 177 31[n 4] 19[46] 52°42′21.64″N 8°58′21.75″W R343620 6139
Deenish Island [n 13] Clare Fergus Estuary 44[n 5] 28[n 4] 13[46] 52°42′59.83″N 8°57′53.94″W R351631 6153
Horse Island Clare Fergus Estuary 34 8[n 4] 13[47] 52°44′47.04″N 9°1′47.54″W R301667 7021
Inishmore or Deer Island Inis Mór Clare Fergus Estuary 444 36 133 0 None 52°42′51.13″N 9°2′4.73″W R300630 6879
Coney Island Oileán na gCoiníní Clare Fergus Estuary 245 44 145 0 None 52°42′38.03″N 9°0′28.32″W R321626 6923
Inishmacowney Inis Mhic Uaithne Clare Fergus Estuary 225 ≥20[n 14] 142 0 None 52°41′2.66″N 9°2′53.57″W R290596 6929
Canon Island Oileán na gCanánach Clare Shannon Estuary 271 28[n 4] 54 0 52°40′N 9°23′W R2959 1166545
Inishloe Inis Lua Clare Shannon Estuary 131 13 114 0 52°40′38.17″N 9°1′14.67″W R310588 6969
Inishtubbrid Inis Tiobrad Clare Shannon Estuary 85 33 0 0 None 52°40′8.05″N 9°3′57.53″W R279579 6971
Inishcorker Inis Corcair Clare Shannon Estuary 207 31 7 0 Road bridge 52°40′38.17″N 9°1′14.67″W R264579 6968
Inishbig, or Hog Island [n 15] Clare Shannon Estuary 43 14 8 52°37′13.59″N 9°30′0.4″W Q9752 7205
Scattery Island Inis Cathaigh Clare Shannon Estuary 179 14 65 0 52°37′21.8″N 9°6′45.1″W Q9752 7214
Mutton Island Oileán Caorach Clare Atlantic Ocean 159 28 0 0 None 52°48′45.11″N 9°31′26.76″W Q9775 1166533
Aughinish Eachinis Clare Galway Bay 369 23[n 4] 342[48] Road (tombolo) 53°5′24″N 9°2′24″W M2813 1166074
Inisheer or Inishere Inis Oírr Galway Aran Islands 1400 57 456 247 Air from Inverin; passenger ferries from Rossaveal, and seasonally from Galway and Roadford near Doolin 53°3′29″N 9°31′39″W L9802 18684
Inishmaan Inis Meáin Galway Aran Islands 2252 79 473 154 Air from Inverin; passenger ferries from Rossaveal, and seasonally from Galway and Roadford near Doolin 53°5′N 9°35′W L9405 937
Inishmore Árainn Galway Aran Islands 7635[49] 123 2592 824 Air from Inverin; passenger ferries from Rossaveal, and seasonally from Galway and Roadford near Doolin 53°7′25″N 9°43′39″W L8509 938
Brannock Island East Árainn Galway Aran Islands 53°8′14.66″N 9°49′49.49″W
Brannock Island Middle Árainn Galway Aran Islands 53°8′26.3″N 9°50′29.97″W
Brannock Island South Árainn Galway Aran Islands 53°8′29.45″N 9°50′53.76″W
Brannock Island Árainn Galway Aran Islands 53°8′40.57″N 9°50′23.48″W
Rock Island Árainn Galway Aran Islands 53°8′50.39″N 9°51′26.83″W
Island Eddy Oileán Eide Galway Galway Bay 138 8 125 0 None 53°12′N 8°59′W M339164 18613
Tawin East Tamhain Thoir Galway Galway Bay <179[n 16] ≤193[50] Road 53°13′10.43″N 9°0′52.29″W M3219 1166796
Tawin Island Tamhain Galway Galway Bay >218[n 16] 6 ≥108[50] Road via Tawin East 53°13′7.89″N 9°2′12.57″W M3119 18504
Rossroe Island An Ros Galway Greatman's Bay 58 14[n 4] 7 12 Road bridge 53°17′11.83″N 9°36′18.28″W L928275 20704
Inchamakinna Inis Mhic Cionaith Galway Greatman's Bay 109 18[n 4] 41 0 None L920267 20702
Annaghvaan Eanach Mheáin Galway Gorumna group 311 15 125 140 Road bridge 53°18′51.17″N 9°38′26.2″W L9131 20803
Inishlusk Inis Loiscthe Galway Gorumna group 13 8[n 4] 24[51] L898303 20814
Lettermore Leitir Móir Galway Gorumna group 2254 117 844 528 Road bridge via Annaghvaan 53°17′51.72″N 9°40′4.46″W L8829 20818
Gorumna Garmna Galway Gorumna group 5871 53 1910 1010 Road bridge via Lettermore 53°15′0″N 9°40′48″W L8824 1166158
Lettermullen or Lettermullan Leitir Mealláin Galway Gorumna group 787 45 587 213 Road bridge via Gorumna 53°14′38″N 9°43′34″W L8423 20728
Crappagh Island an Cnapach Galway Gorumna group 118 16 53[52] 0 Road bridge via Lettermullen 53°14′31.31″N 9°45′4.91″W L8323 20720
Furnace Island Fornais Galway Gorumna group 219 27 155 65 Road bridge via Lettermullen 53°15′18.27″N 9°44′32.47″W L8424 20724
Inisherk Inis Eirc Galway Gorumna group 64 27 49 0 53°14′58.12″N 9°45′10.17″W L829235 20727
Dinish Island Daighinis Galway Gorumna group 95 19 59[52] 53°15′44.52″N 9°45′14.18″W L828250 20721
Inishbarra Inis Bearachain Galway Gorumna group 262 37 205 1 L8627 20813
Illauneeragh an tOileán Iatharach Galway Gorumna group 90 21 15 0 L842270 20809
Inishtravin Inis Treabhair Galway Kilkieran Bay 190 14 93 1 None L885311 18158
Clynagh Island Cladhnach Galway Camus Bay 103 15 0 0 None L953272 20706
Inisheltia Inis Aillte Galway Camus Bay 67 12 0 0 None L938347 20931
Roeillaun Rua-oileáin Galway Kilkieran Bay 3 17 0 None L681591 18341
Illaunmore an tOileán Mór Galway Kilkieran Bay 96 14 89 1 None L897349 1398093
Illauneeragh West an tOileán Iarthach Thiar Galway Kilkieran Bay 78 15 65 0 L886347 20928
Finish Island Fínis Galway Maínis Bay 154 8 66 0 Tombolo L7929 1166125
Rusheennacholla Roisín an Chalaidh Galway Maínis Bay 79 10[n 4] 53 7 Road L776305 18278
Mweenish Island Maínis Galway Maínis Bay 572 23 649 140 Road via Rusheennacholla 53°18′01″N 9°52′35″W L7629 1166448
Masson Island or Mason Island Oileán Máisean Galway Atlantic Ocean 92 14 98 0 L7429 1166541
St Macdara's Island Cruach na Cara Galway Atlantic Ocean 61 27 9[53] 0 L719302 18280
Croaghnakeela Island Cruach na Caoile Galway Atlantic Ocean 141 63 0 0 L6933 1165930
Freaghillaun Fraochoileán Galway Atlantic Ocean 39 30[n 4] L732351 18262
Illaungorm North An tOileán Gorm Thuaidh Galway Bertraghboy Bay 33 5 3[54] 0 None L7856639789 18313
Inishnee Inis Ní Galway Bertraghboy Bay 856 48[n 4] 455 28 Road 53°23′56″N 9°53′49″W L7441 18353
Inishlackan Inis Leacan Galway Gorteen Bay 129 13 126 0 L717375 18352
Inishdawros Inis Damhraí Galway Ballyconneely Bay 22 3 8[55] 0 None L642409 18090
Illaunamid Oileán Imill Galway Atlantic Ocean 29 27[n 4] 30[56] 0 L517410 18192
Turbot Island, Talbot Island, or Inish Toirbirt Tairbeart Galway Atlantic Ocean 148 13 146 0 None 53°30′2.63″N 10°8′59.42″W L574522 18142
Inishturk or Inishturk South Inis Toirc Theas Galway Atlantic Ocean 133 37 84 1 None 53°30′32″N 10°8′59″W L5753 1166271
Omey Island Iomaí Galway Atlantic Ocean 522 28 397 2 53°32′7″N 10°9′27″W L5755 1166277
Cruagh Island an Chruach Galway Atlantic Ocean 83 62[n 4] 0 0 L5355 18367
High Island Ardoileán Galway Atlantic Ocean 82 63[n 4] 0 0 53°32′47″N 10°15′25″W L5057 18376
Inishbofin Inis Bó Finne Galway Atlantic Ocean 3151[57] 89 1404 199 Passenger ferry from Cleggan 53°37′N 10°12′W L5565 18238
Inishlyon Inis Laighean Galway Atlantic Ocean 75 43 0 0 L566646 18241
Inishark or Inishshark Inis Airc Galway Atlantic Ocean 581 100 208 0 53°36′42″N 10°16′58″W L5067 1166239
Davillaun Damhoileán Galway Inishbofin group 60 28[n 4] 0 0 L587663 18234
Crump Island Oileán Dá Chruinne Galway Atlantic Ocean 63 25 16 0 L6865 18144
Inishturk Inis Toirc Mayo Atlantic Ocean 1446 191 577 58 Passenger ferry from Roonah Quay, beyond Louisburgh 53°42′5″N 10°6′30″W L6174 1375327
Caher Island Oileán na Cathrach Mayo Atlantic Ocean 128 61[n 4] 0 0 53°43′3″N 10°1′38″W L6676 1166544
Clare Island Cliara Mayo Clew Bay 3949 462 (Knockmore) 1615 136 Passenger ferry from Roonah Quay, beyond Louisburgh 53°48′18″N 9°59′37″W L6885 36982
Dorinish (Dorinish More and Dorinish Beg) Deoirinis Mayo Clew Bay 15[n 17] 25 13 0 53°48′45″N 9°40′18″W L900858 37268
Inisheeny Inis Aonaigh Mayo Westport Bay 26 22 36[58] L920845 37323
Inishraher Inis Raithir Mayo Westport Bay 27 33 25 0 L925852 37291
Annagh Islands Mayo Westport Bay 48 (East)
12 (Middle)
17 (West)		 9[n 4] (East)
6 (West)		 33 (total)[59] L948833 114009
Illanataggart Oileán an tSagairt Mayo Clew Bay 30 28 33 0 L928868 37275
Crovinish Croibhinis Mayo Dorinish Harbour 29 23 32[58] L918866 37260
Inishlyre Inis Ladhair Mayo Dorinish Harbour 52 26 113 7 L912873 37288
Inishgort Inis Goirt Mayo Clew Bay 28 29 32 1 L902879 37281
Collanmore Island or Collan More Island Collainn Mhór Mayo Clew Bay 197 53[n 4] 213 18 L920882 37253
Clynish Claidhnis Mayo Clew Bay 80 42 87 5 L923894 37251
Island More an tOileán Mór Mayo Clew Bay 77 42 88 1 [n 18] L903893 37293
Knockycahillaun Cnoc Uí Chathaláin Mayo Clew Bay 34 36 41 0 None[n 18] L910896 37298
Derrinish Dairinis Mayo Newport Bay 30 21 40[58] L913902 37262
Inishbee Mayo Newport Bay 38 29 20[58] L901902 37279
Inishgowla Inis Gabhla Mayo Newport Bay 32 28 52[58] L911911 37282
Inishoo Inis Uamha Mayo Newport Bay 17 29 29[58] L901911 37290
Inishnakillew Inis na Coilleadh Mayo Newport Bay 59 27 126 3 Causeway L937902 37289
Inishcottle Inis Cotail Mayo Newport Bay 24 26 40 3 Causeway via Inishnakillew L928905 37280
Inishturk Inis Toirc Mayo Newport Bay 59 51 57[58] L940909 37292
Inishdaff Inis Damh Mayo Newport Bay 33 31 44[60] L948914 37099
Rosbarnagh Island Oileán Ros Bairneach Mayo Newport Bay 53 37 42[60] Road bridge L953926 37089
Inishturlin Mayo Newport Bay 21 27 25[60] L947931 37079
Rosmore Island An Ros Mór Mayo Newport Bay 104[n 19] 28 133[n 19][61] Road bridge L961942 37436
Rosturk Island Ros Toirc Mayo Newport Bay 34 24 64[62] Connected at low tide L913946 37494
Inishquirk Inis Coirce Mayo Newport Bay 28 44 37[62] L904943 37472
Inishtubbrid Mayo Newport Bay 37 28 42[62] L897947 37473
Inishnacross Inis na Croise Mayo Newport Bay 26 36 27[62] L888941 37471
Inishbobunnan Mayo Newport Bay 24 31 13[62] L889954 37459
Inishgowla Mayo Newport Bay 32 32 28[62] L887950 37467
Inishilra Mayo Newport Bay 8 18 12[62] L895939 37468
Inishkeel Inis Caol Mayo Newport Bay 30 27 23[62] L878953 37469
Inisherkin Inis Earcáin Mayo Newport Bay 31 30 28[62] L878945 37466
Inishcooa Mayo Newport Bay 21 27 6[62] L876938 37461
Moynish More Maínis Mór Mayo Clew Bay 62 37 99[62] L864945 37481
Achill Island Acaill Mayo Atlantic Ocean 35283[63] 688 (Croaghaun) 4901 2620 Road bridge (Michael Davitt Bridge) 54°N 10°W F6803 1165355
Achillbeg Acaill Bheag Mayo Atlantic Ocean 331 110 178 0 53°51′N 9°57′W L7292 1165356
Annagh Island Oileán an Eanaigh Mayo Blacksod Bay 627 23 0[n 20] 0 F778052 36937
Inishbiggle Inis Bigil Mayo Blacksod Bay 637 34 67 24 53°59′45″N 9°54′15″W F7507 36863
Barranagh Island Oileán Bearanach Mayo Elly Bay 63 7 0 0 Tombolo F667258 35255
Duvillaun Beg Dubhoileán Beag Mayo Atlantic Ocean 25 14 0 0 F5916 35271
Duvillaun More Dubhoileán Mór Mayo Atlantic Ocean 155 60 31 0 F5816 35272
Inishkea South Inis Gé Theas Mayo Inishkea Islands 344 72 (Knocknaskea) 62[64] 0 F5420 35278
Inishkea North Inis Gé Thuaidh Mayo Inishkea Islands 464 24 155[64] 0 F5623 35277
Inishglora Inis Gluaire Mayo Atlantic Ocean 37 22 16[64] 0 54°12′31″N 10°7′38″W F6131 1166254
Eagle Island Oileán sa Tuaidh Mayo Atlantic Ocean 14 60 15 0 F6339 1166546
Kid Island Oileán Mionnán Mayo Broadhaven Bay 25 86 0 0 F787436 35405
Illanmaster Oileán Máistir Mayo Atlantic Ocean 7 108[n 4] 0 0 None 54°20′N 9°38′W F934432 1399573
Bartragh Island an Bheartrach Mayo Killala Bay 316 26 28 0 None 54°12′50″N 9°9′47″W G245300 34513
Inishmulclohy or Coney Island Inis Uí Mhaolchluiche Sligo Sligo Harbour 388 13 124 6 Connected by strand at low tide G617388 45348
Oyster Island Inis Rórais Sligo Sligo Harbour 33 14[n 4] 28 0 G631393 45365
Inishmurray Inis Muirígh Sligo Donegal Bay 209 23[n 4] 0 0 54°26′N 8°40′W G572539 45211
Conor's Island Oileán Chonchúir Sligo Donegal Bay 111[n 5] 16[n 4] 15 0 Road (no longer an island) F654515 45206
Dernish Dairinis Sligo Donegal Bay 103 32 42 0 G677528 45207
Inishpat Donegal Donegal Harbour 17 25 7[65] F591874 14142
Rooney's Island Oileán Uí Ruanaí Donegal Donegal Harbour 34 32[n 4] 6[66] F591875 14297
Rotten Island an tOileán Bréan Donegal Killybegs Harbour 1 11 0 54°36′52.13″N 8°26′25.55″W F715742 14875
Rathlin O'Birne Island Reachlainn Uí Bhirn Donegal Atlantic Ocean 50[n 21] 26 0 0 G4680 1166602
Inishkeel Inis Caoil Donegal Gweebarra Bay 81 19 16[67] 0 Connected by strand at low tide 54°50′51″N 8°27′22″W B7000 1166244
Inishkeeragh Inis Caorach Donegal Atlantic Ocean 47 6 52 7 B683123 14535
Inishfree Upper Inis Fraoigh Donegal Dunglow Bay 541 14 137 9 54°57′20″N 8°26′40″W B715120 14945
Inishal Inis Saille Donegal Dunglow Bay 71 6 43[68] B727113 14943
Rutland Island or Inishmacadurn Inis Mhic an Doirn Donegal Atlantic Ocean 313 ≥20 125 13 54°58′41″N 8°27′27″W B707142 15002
Inishcoo Inis Cú Donegal Atlantic Ocean 109 15 0 None.[n 22] 54°59′13″N 8°27′50″W B706156 15000
Eighter Island an tÍochtar Donegal Atlantic Ocean 60 24 59 0 None[n 22] 54°59′30″N 8°28′27″W B698161 14997
Arranmore or Aran Island Árainn Mhór Donegal Atlantic Ocean 4335[69] 227 1431 522 Car ferry to Burtonport 54°59′22″N 8°31′51″W B6616 14527
Cruit Island an Chruit Donegal Rosses Bay 941 32 258 53 Road bridge 55°3′3″N 8°14′8″W B7321 111107
Owey Island Uaigh Donegal Rosses Bay 301 102 94 27 55°3′17″N 8°27′3″W B712231 15013
Inishfree Lower Inis Fraoigh Donegal Inishfree Bay 45 25 0 0 B756241 14514
Inishinny Inis Sionnaigh Donegal Gweedore Bay 62 27 4[70] 0 B785252 1390473
Gola Island Gabhla Donegal Gweedore Bay 424 68 68 4 55°3′3″N 8°14′8″W B7727 14467
Inishmeane Inis Meáin Donegal Gweedore Bay 117 33 12 0 55°06′15.65″N 8°20′46.04″W B785286 14495
Inishsirrer Inis Oirthir Donegal Gweedore Bay 109 23 0[n 23] 0 55°07′04″N 8°20′36″W B7830 1166267
Inishbofin Inis Bó Finne Donegal Tory Sound 298 33 121 36 55°10′24″N 8°10′8″W B889365 14448
Inishdooey Oileán Dúiche Donegal Tory Sound 87 38 9[71] 55°11′24″N 8°9′50″W B896383 14449
Tory Island Toraigh Donegal Atlantic Ocean 785 83 399 142 Passenger ferries to Bunbeg and Meenlaragh near Falcarragh 55°15′45″N 8°13′0″W B851465 14500
Island Roy Oileán an Bhráighe Donegal Mulroy Bay 91 12[n 4] 74 13 Road causeway C133381 16063
Aughnish Donegal Lough Swilly 66 25 26 3 Road causeway C252215 15974
Inch Island an Inis Donegal Lough Swilly 3425[72] 222 978[73] 438[72] Road causeways 55°04′08″N 7°29′18″W C3324 1166237
Inishtrahull Inis Trá Tholl Donegal Atlantic Ocean 113 49 54 0 55°25′48″N 7°14′2″W C4565 14546
Notes
  1. Taken from the Placenames Database of Ireland entry linked in the PDI ref column
  2. Unless stated otherwise, area is from Ordnance Survey Ireland's 19th-century 6" maps (viewable via the Historic 6" layer of the link in the OS-map column)
  3. Unless stated otherwise, height is from Ordnance Survey Ireland's 1:50,000 series maps (viewable for Republic of Ireland islands via the Wind Report layer of the link in the OS-map column )
  4. Converted from height in feet given on Ordnance Survey Ireland's 19th-century 6" maps (viewable via the Historic 6" layer of the link in the OS-map column)
  5. 19th-century area, before reclamation
  6. Combined total of Dunkerron Island East and Dunkerron Island West.[36]
  7. Dunkerron Island East and West are connected at low tide.
  8. Cappanacush is the largest of the Greenane Islands. It is listed separately and its area and population are excluded from the totals. It constitutes a separate townland.
  9. 170 in 1851
  10. Not enumerated separately from Rossdoohan townland on the mainland; combined population 163.[39]
  11. 11 in 1911
  12. 13 in 1881
  13. Duínis on OSI 1:50,000 map
  14. The maximum spot height of 24 feet on the 6" map is incompatible with the 20-metre contour line present on the 1:50,000 map.
  15. Inis Bhig on OSI 1:50,000 map
  16. Tawin Island comprise the townland of Tawin West (218 acres (88 hectares), 108 people) and part of the townland of Tawin East (179 acres (72 hectares), 193 people). Tawin East Island comprises the balance of the townland of Tawin East.
  17. Excluding the tombolo linking Dorinish More and Dorinish Beg
  18. Island More and Knockycahillaun are now connected;
  19. Comprising townlands of Rosmore (78 acres (32 hectares), 90 people) and Lisduff (27 acre, 43 people)
  20. 18 in 1851
  21. Excluding the 10 acres (4.0 hectares) of Kinkeel, connected at low tide.
  22. There is a foot bridge between Eighter and Inishcoo.
  23. 30 in 1861
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References
  1. Ptolemy, Geog., Bk. 2, Ch. 1 & 2.
  2. 2011 Census gives 6500 for Cobh Town and 7534 for Cobh Rural ED; most were on Great Island but 148 were on Haulbowline and some on Fota Island.
  3. Unless stated otherwise, populations are from Population (Number) by Off Shore Island, Year and Sex Central Statistics Office
  4. "Area Measurements in Northern Ireland". Northern Ireland Statistics and Research Agency. 12 April 2006. Archived from the original on 17 June 2007. Retrieved 11 September 2010.
  5. Elwood, J. H. (Winter 1968). "The population of Rathlin Island". Ulster Medical Journal. 37 (1): 64–70. PMC 2384959. PMID 5656183.
  6. "Earl and Countess of Wessex set sail for Rathlin Island". Northern Ireland Office. 9 June 2010. Archived from the original on 27 February 2012. Retrieved 11 September 2010.
  7. "Maidens". Commissioners of Irish Lights. Retrieved 16 October 2010.
  8. Commissioners 14th Rpt, p.45 Bangor E. Division
  9. "Aids to Navigation Review 2010–2015". General Lighthouse Authorities of the United Kingdom and Ireland. 2010. p. 103. Archived from the original on 4 June 2012. Retrieved 18 September 2010.
  10. Commissioners 14th Rpt, p.44 Grey Abbey E Division
  11. Commissioners 14th Rpt, p.46 Comber E Division
  12. "Island Hill & North Strangford Nature Reserve". Walk NI. Countryside Access & Activities Network. Archived from the original on 28 August 2013. Retrieved 16 October 2010.
  13. Commissioners 14th Rpt, p.47 Tullynakill E Division
  14. Commissioners 14th Rpt, p.42–3 Killinchy E Division
  15. Commissioners 14th Rpt, p.43 Killyleagh E Division
  16. Commissioners 14th Rpt, p.44 Ranolf E Division
  17. Commissioners, 12th R, p.54 Skerries E Division
  18. Commissioners 14th Rpt, p.22 Howth E Division
  19. "The Bull Island Nature Reserve". Clontarf Online. Retrieved 12 October 2010. the area above high tide is approximately 300 hectares
  20. Commissioners 14th Rpt, p.14 Killiney E Division
  21. Commissioners 9th Report, p.8 South Cork Union, Queenstown E. Division. The Great Island area and population are those of the total ED (7,012 acres (2,838 hectares), 10060 people) less those of Foaty, Haulbowline, Spike, Rocky, and Coney Islands (897 acres (363 hectares), 636 people)
  22. 2006 Census Vol.1 Table 6 gives 6541 for Cobh town and 6339 for Cobh rural ED; most were on Great Island but 165 were on Haulbowline and some on Fota Island.
  23. "Background Information" (PDF). Dept of the Environment. pp. 23–4. Archived from the original (PDF) on 28 August 2013. Retrieved 20 September 2010. It may therefore be concluded that the area of the island was 23.5 ha when steel processing started in 1938 and 34.9 ha when production ceased in 2001
  24. Commissioners 2nd Rpt, p.17 Myross E Division
  25. Commissioners 2nd Rpt, p.15 Cape Clear E Division
  26. Commissioners 2nd Rpt, p.19 Kilcoe E Division
  27. Commissioners, 2nd Rpt, p.14 Aghadown South E Division
  28. Commissioners, 2nd Rpt, p.19 Skull E Division
  29. Commissioners 2nd Rpt, p.18 Ballydehob E Division
  30. Including Chapel Island Little
  31. Commissioners, 3rd Rpt, p.6 Whiddy E Division
  32. Commissioners Third Rept, p.7 Bere E Division (excluding Fourteen Islands)
  33. "Inis Fearn Ard". Placenames Database of Ireland. Dublin City University. Retrieved July 9, 2016.
  34. Commissioners Third Rept, p.8 Kilcatherine E Division
  35. Commissioners 6th Rpt, p.39 Dawros E. Division
  36. Commissioners 6th Rpt, p.40 Reen E. Division
  37. Commissioners 6th Rpt, p.39 Dromore E. Division
  38. Commissioners 6th Rpt, p.39 Greenane E. Division
  39. Commissioners 6th Rpt, p.40 Tahilla E. Division
  40. Commissioners 6th Rpt, p.39 Castlecove E. Division
  41. Commissioners 8th Rpt p.29
  42. Commissioners 8th Rpt, p.12 Dunquin E Division
  43. Commissioners 8th Rpt, p.22 Ballynanaglish E Division
  44. Commissioners 8th Rpt, p.45 Shanagolden E Division
  45. Commissioners 8th Rpt, p.34 Aughinish E Division (Aughinish East and Aughinish West)
  46. Commissioners 7th Rpt, p.4 Clenagh E Division
  47. Commissioners 7th Rpt, p.21 Lisheen E Division
  48. Commissioners 7th Rpt, p.26 Doorus E Division
  49. Parl Gazz Irl Vol.1 p.86
  50. Commissioners 7th Rpt, p.17 Ballynacourty E Division
  51. Commissioners 4th Rpt, p.21 Lettermore E. Division
  52. Commissioners 4th Rpt, p.21 Gorumna E. Division
  53. Commissioners 6th Rpt, p.10 Knockboy E. Division
  54. Commissioners 6th Rpt, p.10 Owengowla E. Division
  55. Commissioners 6th Rpt, p.9 Bunowen E. Division
  56. Commissioners 6th Rpt, p.10 Doonloughan E. Division
  57. Parl Gazz Irl Vol.3 p.316
  58. Commissioners 4th Rpt, p.12 Kilmeena E Division
  59. Commissioners 4th Rpt, p.11 Croaghpatrick E Division
  60. Commissioners 4th Rpt, p.14 Derryloughan E Division
  61. Commissioners 4th Rpt, p.15 Newport East E Division
  62. Commissioners 4th Rpt, p.15 Newport West E Division
  63. Parl Gazz Irl Vol.1 p.8
  64. Commissioners Second report, p.11 Binghamstown South E D
  65. Commissioners 5th Rpt, p.14 Laghy E Division
  66. Commissioners 5th Rpt, p.14 Tullynaught E Division
  67. Commissioners 5th Rpt, p.17 Maas E Division
  68. Commissioners 5th Rpt, p.17 Maghery E Division
  69. Parl Gazz Irl Vol.1 p.87
  70. Commissioners 11th Rpt, p.8 Gweedore E Division
  71. Commissioners 11th Rpt, p.8 Meenaclady E Division
  72. 2006 Census, Vol.1 Table 6, p.116
  73. Commissioners 14th Rpt, p.61 Inch E Division

See also
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