As of the census[1] of 2000, there were 2,238 people, 821 households, and 637 families residing in the township.

There were 929 housing units at an average density of 30.1 per square mile (11.6/km2).

18.3% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.

Clam Lake Township is served by two separate public school districts.

A smaller portion of the southwest corner of the township is served by Pine River Area Schools to the south in the village of LeRoy in Osceola County.