Plainfield Township is served by four separate school districts.

Comstock Park Public Schools serves a small western portion, and Kenowa Hills Public Schools also serves a very small western portion of the township.

[11] As of the 2020 United States census,[12] the township had a population of 33,535 people.

As of the census[1] of 2000, there were 30,195 people, 11,038 households, and 8,168 families residing in the township.

21.7% of all households were made up of individuals, and 6.7% had someone living alone who was 65 years of age or older.