Londonderry Township, Dauphin County, Pennsylvania

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Londonderry Township is a township in Dauphin County, Pennsylvania, United States. The population was 5,224 at the 2000 census. The township includes the site of the Three Mile Island Nuclear Generating Station accident in 1979. It was the largest accident of its kind in the American nuclear power generating industry.


According to the United States Census Bureau, the township has a total area of 26.9 square miles (69.6 km²), of which, 22.8 square miles (59.0 km²) of it is land and 4.1 square miles (10.6 km²) of it (15.23%) is water.


As of the census[1] 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.



Berrysburg | Dauphin | Elizabethville | Gratz | Halifax | Highspire | Hummelstown | Lykens | Middletown | Millersburg | Paxtang | Penbrook | Pillow | Royalton | Steelton | Williamstown

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