As of the census[1] of 2000, there were 4,678 people, 1,602 households, and 1,291 families residing in the township.

There were 1,789 housing units at an average density of 50.0 per square mile (19.3/km2).

The racial makeup of the township was 96.86% White, 0.13% African American, 0.58% Native American, 0.43% Asian, 0.02% Pacific Islander, 1.18% from other races, and 0.81% from two or more races.

15.4% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older.

Attica is locally governed by a five-member township board, consisting of a supervisor, a clerk, a treasurer, and two trustees.