Londonderry Township, Dauphin County, Pennsylvania

Londonderry Township, Dauphin County, Pennsylvania
Three Mile Island
Official logo of Londonderry Township, Dauphin County, Pennsylvania
Location in Dauphin County and state of Pennsylvania.
Location in Dauphin County and state of Pennsylvania.
Country United States
State Pennsylvania
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
 • Total4,890 Decrease
 • Estimate 
(2021)[2]
4,885
 • Density228.57/sq mi (88.25/km2)
Time zoneUTC-5 (Eastern (EST))
 • Summer (DST)UTC-4 (EDT)
Area code717
FIPS code42-043-44464
Websitelondonderrypa.org

Londonderry Township is a township in Dauphin County, Pennsylvania, United States. The population was 4,890 at the 2020 census.[2]

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. The nuclear power plant closed in 2019.

  1. ^ "2016 U.S. Gazetteer Files". United States Census Bureau. Retrieved Aug 13, 2017.
  2. ^ a b c Bureau, US Census. "City and Town Population Totals: 2020-2021". Census.gov. US Census Bureau. Retrieved 12 July 2022.

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