[3] Harrison Township is located in western Bedford County.

The borough of Manns Choice is along the northern border but is not part of the township.

[4] Portions of the Pennsylvania State Game Lands Number 48 is located in the township.

The racial makeup of the township was 99.11% White, 0.10% African American, 0.40% Asian, 0.20% Pacific Islander, and 0.20% from two or more races.

20.3% of all households were made up of individuals, and 10.6% had someone living alone who was 65 years of age or older.