List of highways numbered 78

The following highways are numbered 78:

International

Australia

Waterfall Way- New South Wales State Route B78

China

G78 Expressway

Iran

Road 78

Korea, South

Gukjido 78

New Zealand

New Zealand State Highway 78 - New Zealand's shortest State Highway

United States

Interstate 78
U.S. Route 78
Alabama State Route 78
Arizona State Route 78
Arkansas Highway 78
California State Route 78
Colorado State Highway 78
Connecticut Route 78
Florida State Road 78
- County Road 78 (Glades County, Florida)
  - County Road 78A (Glades County, Florida)
  - County Road 78B (Glades County, Florida)
- County Road 78 (Hendry County, Florida)
  - County Road 78A (Hendry County, Florida)
- County Road 78 (Lee County, Florida)
  - County Road 78A (Lee County, Florida)
Georgia State Route 78
Hawaii Route 78 (former)
Idaho State Highway 78
Illinois Route 78
Iowa Highway 78
K-78 (Kansas highway)
Kentucky Route 78
Louisiana Highway 78
Maryland Route 78 (former)
Massachusetts Route 78
M-78 (Michigan highway)
Minnesota State Highway 78
- County Road 78 (Ramsey County, Minnesota)
- County Road 78 (Scott County, Minnesota)
Missouri Route 78
- Missouri Route 78 (1922) (former)
Montana Highway 78
Nebraska Highway 78
- Nebraska Spur 78B
- Nebraska Spur 78C
- Nebraska Spur 78D
- Nebraska Spur 78E
- Nebraska Spur 78F
- Nebraska Spur 78H
- Nebraska Spur 78J
- Nebraska Recreation Road 78K
Nevada State Route 78 (former)
New Hampshire Route 78
County Route 78 (Bergen County, New Jersey)
New Mexico State Road 78
New York State Route 78
- County Route 78 (Chemung County, New York)
- County Route 78 (Dutchess County, New York)
- County Route 78 (Herkimer County, New York)
- County Route 78 (Jefferson County, New York)
- County Route 78 (Lewis County, New York)
- County Route 78 (Madison County, New York)
- County Route 78 (Monroe County, New York)
- County Route 78 (Montgomery County, New York)
- County Route 78 (Niagara County, New York)
- County Route 78 (Orange County, New York)
- County Route 78 (Steuben County, New York)
- County Route 78 (Suffolk County, New York)
- County Route 78 (Warren County, New York)
North Carolina Highway 78
Ohio State Route 78
Oklahoma State Highway 78
Oregon Route 78
Pennsylvania Route 78 (former)
Rhode Island Route 78
Tennessee State Route 78
Texas State Highway 78
- Texas State Highway Spur 78
- Farm to Market Road 78
- Urban Road 78 (signed as Farm to Market Road 78)
Utah State Route 78
Vermont Route 78
Virginia State Route 78
West Virginia Route 78
Wisconsin Highway 78
Wyoming Highway 78