Richland Township, Allegheny County, Pennsylvania  Richland Township is a township in Allegheny County, Pennsylvania, United States. The population was 11,100 at the 2010 census. The township was named for its fertile soil. According to the United States Census Bureau, the township has a total area of 14.6 square miles (37.7 km²), all of it land. Richland Township has six borders, including the townships of West Deer to the east, Hampton to the south and Pine to the west. The other three borders are with Butler County neighborhoods: Valencia to the northwest, Adams Township to the north and Middlesex Township to the northeast. At the 2000 census there were 9,231 people in 3,353 households, including 2,491 families, in the township. The population density was 634.3 people per square mile (245.0/km²). There were 3,508 housing units at an average density of 241.0 per square mile (93.1/km²). The racial makeup of the township was 98.31% White, 0.47% African American, 0.08% Native American, 0.57% Asian, 0.14% from other races, and 0.43% from two or more races. Hispanic or Latino of any race were 0.65%. There were 3,353 households, 38.0% had children under the age of 18 living with them, 65.0% were married couples living together, 7.2% had a female householder with no husband present, and 25.7% were non-families. 23.1% of households were made up of individuals, and 11.8% were one person aged 65 or older. The average household size was 2.67 and the average family size was 3.18. The age distribution was 27.8% under the age of 18, 4.6% from 18 to 24, 28.5% from 25 to 44, 23.7% from 45 to 64, and 15.5% 65 or older. The median age was 40 years. For every 100 females there were 92.3 males. For every 100 females age 18 and over, there were 86.9 males. The median household income was $57,672 and the median family income was $67,471. Males had a median income of $50,699 versus $33,304 for females. The per capita income for the township was $25,085. About 4.0% of families and 5.0% of the population were below the poverty line, including 5.9% of those under age 18 and 5.4% of those age 65 or over.