Londonderry
Township in Dauphin County, Pennsylvania

Londonderry is a township in Dauphin County, Pennsylvania, with 4,899 residents (2020 Census). The nearest town is Royalton, 1.4 miles W.
- 4,899residents (2020 Census)
- 22.8 sq miland area · 58.9 km²
- 215 / sq mipopulation density
- 17057ZIP code
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
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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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Open in Google Maps ›Londonderry, PA population
Londonderry had 4,899 residents in the 2020 Census.
| 2020 Census | 4,899 |
|---|---|
| Density | 215 per sq mi (83 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Londonderry at a glance
| State | Pennsylvania (PA) |
|---|---|
| County | Dauphin County |
| Type | Township |
| Population | 4,899 (2020) |
| Land area | 22.76 sq mi (58.9 km²) |
| Water area | 4.15 sq mi (10.75 km²) |
| Coordinates | 40.1839° N, 76.6971° W |
| ZIP code | 17057 |
| Census code (GEOID) | 4204344464 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Londonderry
- Royalton1.4 mi W
- Middletown2.1 mi NW
- Goldsboro3.5 mi SW
- Falmouth3.7 mi S
- Lower Swatara4.0 mi NW
- Conewago4.8 mi NE
- Highspire5.0 mi W
- York Haven5.2 mi S
- West Donegal5.4 mi SE
- Valley Green5.5 mi W
- Elizabethtown5.6 mi E
- Conoy5.7 mi S
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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