Pine Grove is a town in Portage County, Wisconsin, United States.

As of the census of 2000, there were 904 people, 333 households, and 243 families residing in the town.

There were 371 housing units at an average density of 9.9 per square mile (3.8/km2).

23.4% of all households were made up of individuals, and 8.7% had someone living alone who was 65 years of age or older.

Out of the total people living in poverty, 12.1% are under the age of 18 and 9.0% are 65 or older.