Buffalo Creek, a tributary of the Allegheny River, flows southward through the township.

According to the United States Census Bureau, the township has a total area of 26.1 square miles (67.5 km2), all land.

[3] A portion of Pennsylvania State Game Lands Number 259 is located in West Franklin Township.

19.5% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older.

West Franklin Township appears in the 1876 Atlas of Armstrong County, Pennsylvania.