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Zerbe Township is a township in Northumberland County, Pennsylvania, United States. The population was 2,021 at the 2000 census.
According to the United States Census Bureau, the township has a total area of 11.6 square miles (30.0 km²), of which, 11.6 square miles (30.0 km²) of it is land and 0.09% is water.
As of the census of 2000, there were 2,021 people, 871 households, and 561 families residing in the township. The population density was 174.4 people per square mile (67.3/km²). There were 946 housing units at an average density of 81.6/sq mi (31.5/km²). The racial makeup of the township was 98.71% White, 0.15% African American, 0.05% Native American, 0.15% Asian, 0.15% from other races, and 0.79% from two or more races. Hispanic or Latino of any race were 0.40% of the population.
There were 871 households out of which 25.3% had children under the age of 18 living with them, 52.4% were married couples living together, 8.4% had a female householder with no husband present, and 35.5% were non-families. 31.8% of all households were made up of individuals and 16.5% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.92.
In the township the population was spread out with 21.2% under the age of 18, 7.0% from 18 to 24, 27.6% from 25 to 44, 23.8% from 45 to 64, and 20.3% who were 65 years of age or older. The median age was 42 years. For every 100 females there were 100.5 males. For every 100 females age 18 and over, there were 95.1 males.
The median income for a household in the township was $31,964, and the median income for a family was $38,000. Males had a median income of $30,236 versus $18,207 for females. The per capita income for the township was $15,780. About 6.0% of families and 8.6% of the population were below the poverty line, including 7.8% of those under age 18 and 13.5% of those age 65 or over.
Coordinates: 40°47′00″N 76°37′59″W / 40.78333°N 76.63306°W