The northeast corner of the township is drained by Port Creek, a tributary of the Huron River, while the southwest corner is drained by Stony Creek.

Ash Township is served by three separate school districts.

The vast majority of the township is served by Airport Community Schools.

Another very small northeastern portion of the township along Telegraph Road is served by Flat Rock Community Schools in Flat Rock in Wayne County.

[12] As of the census[3] of 2000, there were 7,610 people, 2,801 households, and 2,125 families residing in the township.

20.3% of all households were made up of individuals, and 7.1% had someone living alone who was 65 years of age or older.