[2] Allison Township is in southern Clinton County, bordered on the east by the West Branch Susquehanna River, the city of Lock Haven, and the borough of Flemington, and on the west by Bald Eagle Township.

[3] As of the census[6] of 2000, there were 198 people, 77 households, and 60 families residing in the township.

There were 81 housing units at an average density of 43.3 per square mile (16.7/km2).

18.2% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older.

About 6.3% of families and 7.1% of the population were below the poverty line, including 2.9% of those under the age of eighteen and 18.9% of those sixty five or over.