Oak Grove is a town in Pierce County, Wisconsin, United States.

As of the census[2] of 2010, there were 2,150 people, 722 households, and 610 families residing in the town.

There were 761 housing units at an average density of 19.4 per square mile (7.5/km2).

There were 722 households, out of which 39.5% had children under the age of 18 living with them, 77.1% were married couples living together, 3.3% had a female householder with no husband present, and 15.5% were non-families.

11.1% of all households were made up of individuals, and 3.0% had someone living alone who was 65 years of age or older.