Fairhaven Township also contains several uninhabited islands in Saginaw Bay, which are mostly contained within Wildfowl Bay State Wildlife Area.

[9] As of the census[1] of 2000, there were 1,259 people, 537 households, and 353 families residing in the township.

There were 770 housing units at an average density of 36.5 per square mile (14.1/km2).

There were 537 households, out of which 29.6% had children under the age of 18 living with them, 52.9% were married couples living together, 9.9% had a female householder with no husband present, and 34.1% were non-families.

30.4% of all households were made up of individuals, and 11.7% had someone living alone who was 65 years of age or older.