Londonderry

Township in Dauphin County, Pennsylvania

View of Londonderry, Pennsylvania
Photo: United States Department of Energy · Public domain

Londonderry is a township in Dauphin County, Pennsylvania, with 4,899 residents (2020 Census). The nearest town is Royalton, 1.4 miles W.

About Londonderry

Londonderry Township is a township in Dauphin County, Pennsylvania, United States. The population was 4,899 at the 2020 census.

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.

Text: Wikipedia · CC BY-SA 4.0

Londonderry weather: 7-day forecast

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Living in Londonderry

Median household income
$91,905
Median home value
$241,700
Median rent
$1,188/mo
Median age
40.5
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Map of Londonderry

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Londonderry Street View

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Londonderry, PA population

Londonderry had 4,899 residents in the 2020 Census.

2020 Census4,899
Density215 per sq mi (83 per km²)

Source: U.S. Census Bureau, Decennial Census.

Londonderry at a glance

StatePennsylvania (PA)
CountyDauphin County
TypeTownship
Population4,899 (2020)
Land area22.76 sq mi (58.9 km²)
Water area4.15 sq mi (10.75 km²)
Coordinates40.1839° N, 76.6971° W
ZIP code17057
Census code (GEOID)4204344464

Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.

Towns near Londonderry

Straight-line distance between town centers.

Frequently asked questions about Londonderry

What county is Londonderry in?

Londonderry is in Dauphin County, Pennsylvania.

What is the population of Londonderry, PA?

4,899 people lived in Londonderry at the 2020 Census.

What is the ZIP code of Londonderry, PA?

The ZIP code of Londonderry is 17057.

What towns are near Londonderry?

Royalton (1.4 mi), Middletown (2.1 mi), Goldsboro (3.5 mi), Falmouth (3.7 mi), Lower Swatara (4.0 mi).

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