Union Township, Mifflin County, Pennsylvania

According to the United States Census Bureau, the township has a total area of 25.5 square miles (66.1 km²), all of it land.

As of the census[4] of 2000, there were 3,313 people, 1,163 households, and 860 families residing in the township. The population density was 129.8 people per square mile (50.1/km²). There were 1,242 housing units at an average density of 48.7/sq mi (18.8/km²). The racial makeup of the township was 99.28% White, 0.21% African American, 0.06% Native American, 0.09% Asian, 0.15% from other races, and 0.21% from two or more races. Hispanic or Latino of any race were 0.30% of the population.

There were 1,163 households, out of which 30.6% had children under the age of 18 living with them, 66.3% were married couples living together, 5.7% had a female householder with no husband present, and 26.0% were non-families. 24.5% of all households were made up of individuals, and 15.3% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.25.

In the township the population was spread out, with 27.8% under the age of 18, 6.4% from 18 to 24, 22.8% from 25 to 44, 19.6% from 45 to 64, and 23.3% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 84.8 males. For every 100 females age 18 and over, there were 80.1 males.

The median income for a household in the township was $32,530, and the median income for a family was $40,000. Males had a median income of $30,965 versus $20,441 for females. The per capita income for the township was $14,185. About 6.2% of families and 10.5% of the population were below the poverty line, including 13.0% of those under age 18 and 14.2% of those age 65 or over.