Londonderry Township, Dauphin County, Pennsylvania

Londonderry Township is a township in Dauphin County, Pennsylvania, United States. The population was 5,235 at the 2010 census.[3]

Londonderry Township,
Dauphin County,
Pennsylvania
Township
Location in Dauphin County and state of Pennsylvania.
CountryUnited States
StatePennsylvania
CountyDauphin
Incorporated1768
Area
 • Total26.93 sq mi (69.74 km2)
 • Land22.75 sq mi (58.93 km2)
 • Water4.17 sq mi (10.80 km2)
Population
 (2010)
 • Total5,235
 • Estimate 
(2016)[2]
5,201
 • Density228.57/sq mi (88.25/km2)
Time zoneUTC-5 (Eastern (EST))
 • Summer (DST)UTC-4 (EDT)
Area code(s)717
FIPS code42-043-44464
Websitelondonderrypa.org

The township includes the Three Mile Island Nuclear Generating Station, the location of the largest accident in the history of the American nuclear power generating industry, which took place in 1979.

History

Londonderry Township originally was part of Derry Township. Since the township was so large and difficult to govern, the residents petitioned the court in 1767 to subdivide the land into two parts, the eastern section to remain Derry and the western to be Londonderry.[4] It is named after County Londonderry in Northern Ireland.[5]

Derry and Londonderry became a part of Dauphin County when it was established in 1785. In 1787, the population of Derry Township was 198. Conewago Township was created in 1850 from southern parts of Derry Township and eastern parts of Londonderry Township.

Geography

Londonderry Township is the southernmost township in Dauphin County. Its western boundary is the western shore of the Susquehanna River, and its southern boundary is formed by Conewago Creek, a tributary. The northwest boundary of the township follows Swatara Creek, except where the township abuts the borough of Royalton. To the west across the Susquehanna is York County, and to the south across Conewago Creek is Lancaster County. There are numerous islands in the Susquehanna River within the township, the largest of which are Hill Island, Shelley Island, Three Mile Island, and Bashore Island.

According to the United States Census Bureau, the township has a total area of 26.9 square miles (69.7 km2), of which 22.7 square miles (58.9 km2) is land and 4.2 square miles (10.8 km2), or 15.49%, is water.[3]

Demographics
Historical population
CensusPop.%±
20105,235—
Est. 20165,201[2]−0.6%
U.S. Decennial Census[6]

As of the census[7] of 2000, there were 5,224 people, 2,004 households, and 1,517 families residing in the township. The population density was 229.4 people per square mile (88.6/km²). There were 2,095 housing units at an average density of 92.0/sq mi (35.5/km²). The racial makeup of the township was 97.74% White, 0.77% African American, 0.10% Native American, 0.25% Asian, 0.11% from other races, and 1.03% from two or more races. Hispanic or Latino of any race were 0.67% of the population.

There were 2,004 households, out of which 33.6% had children under the age of 18 living with them, 63.2% were married couples living together, 7.9% had a female householder with no husband present, and 24.3% were non-families. 20.6% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 2.99.

In the township the population was spread out, with 25.1% under the age of 18, 6.3% from 18 to 24, 30.9% from 25 to 44, 25.5% from 45 to 64, and 12.2% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 96.5 males. For every 100 females age 18 and over, there were 97.0 males.

The median income for a household in the township was $42,804, and the median income for a family was $52,650. Males had a median income of $38,750 versus $27,719 for females. The per capita income for the township was $20,055. About 4.1% of families and 7.0% of the population were below the poverty line, including 8.2% of those under age 18 and 9.2% of those age 65 or over.

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References
  1. "2016 U.S. Gazetteer Files". United States Census Bureau. Retrieved Aug 13, 2017.
  2. "Population and Housing Unit Estimates". Retrieved June 9, 2017.
  3. "Geographic Identifiers: 2010 Demographic Profile Data (G001): Londonderry township, Dauphin County, Pennsylvania". U.S. Census Bureau, American Factfinder. Archived from the original on February 13, 2020. Retrieved December 17, 2015.
  4. "Archived copy". Archived from the original on 2013-05-15. Retrieved 2013-05-12.CS1 maint: archived copy as title (link)
  5. Notes and Queries, Historical, Biographical and Genealogical, Relating Chiefly to Interior Pennsylvania. Harrisburg Publishing Company. 1895. pp. 14–.
  6. "Census of Population and Housing". Census.gov. Retrieved June 4, 2016.
  7. "U.S. Census website". United States Census Bureau. Retrieved 2008-01-31.


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