Armstrong Township, Indiana County, Pennsylvania

The Thomas Covered Bridge was listed on the National Register of Historic Places in 1979.[5]

According to the United States Census Bureau, the township has a total area of 37.7 square miles (98 km²), of which 37.7 square miles (98 km²) are land and 0.04 square miles (0.10 km²), or 0.08%, are water.

As of the census[7] of 2000, there were 3,090 people, 1,160 households, and 882 families residing in the township. The population density was 82.0 people per square mile (31.6/km²). There were 1,232 housing units at an average density of 32.7/sq mi (12.6/km²). The racial makeup of the township was 98.54% White, 0.36% African American, 0.03% Native American, 0.29% Asian, 0.29% from other races, and 0.49% from two or more races. Hispanic or Latino of any race were 0.68% of the population.

There were 1,160 households, out of which 36.3% had children under the age of 18 living with them, 64.1% were married couples living together, 8.2% had a female householder with no husband present, and 23.9% were non-families. 19.9% of all households were made up of individuals, and 5.8% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.02.

In the township the population was spread out, with 25.6% under the age of 18, 7.5% from 18 to 24, 30.0% from 25 to 44, 26.5% from 45 to 64, and 10.4% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 95.8 males. For every 100 females age 18 and over, there were 94.4 males.

The median income for a household in the township was $35,213, and the median income for a family was $41,622. Males had a median income of $31,114 versus $19,875 for females. The per capita income for the township was $17,772. About 6.7% of families and 8.3% of the population were below the poverty line, including 10.9% of those under age 18 and 7.0% of those age 65 or over.

• Armstrong Township official website