Marion Township, Butler County, Pennsylvania

The unincorporated community of Boyers is in the southeastern part of the township.

Slippery Rock Creek flows through the southeast part of the township past Boyers.

According to the United States Census Bureau, the township has a total area of 25.4 square miles (65.9 km2), all land.

[3] As of the 2000 census,[5] there were 1,330 people, 496 households, and 366 families living in the township.

21.2% of all households were made up of individuals, and 9.1% had someone living alone who was 65 years of age or older.