[2] Pennsylvania Route 28 passes through Harrison Township, connecting Kittanning to the northeast and Pittsburgh to the southwest.

[4][5] Harrison Township is located at the far northeast corner of Allegheny County.

There were 5,246 housing units at an average density of 721.4 per square mile (278.5/km2).

31.7% of all households were made up of individuals, and 16.9% had someone living alone who was 65 years of age or older.

The Community Library of Allegheny Valley, Harrison Branch serves the township.

Highlands Golden Rams Stadium (track and football), tennis courts, a soccer field, and the Highlands Community Center are adjacent to the middle school; and several baseball fields are next to the high school.

Heights Elementary School (K–5) was reassigned as the Heights Early Childhood Center (Kindergarten, the Pre-K Counts Program, Head Start, and the YMCA Before/After Childcare Program) in late June 2011; it closed in June 2012.