Oak Grove is a town in Pierce County, Wisconsin, United States. The population was 2,150 at the 2010 census. The unincorporated community of Smith Landing is located in the town.GeographyAccording to the United States Census Bureau, the town has a total area of 39.8 square miles (103.1 km²), of which, 39.3 square miles (101.7 km²) of it is land and 0.5 square miles (1.4 km²) of it (1.33%) is water.DemographicsAs of the census of 2010, there were 2,150 people, 722 households, and 610 families residing in the town. The population density was 54.7 people per square mile (21.1/km²). There were 761 housing units at an average density of 19.4 per square mile (7.5/km²). The racial makeup of the town was 97.72% White, 0.14% African American, 0.19% Native American, 0.60% Asian, 0.60% from other races, and 0.74% from two or more races. Hispanic or Latino of any race were 1.63% of the population.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. The average household size was 2.98 and the average family size was 3.23.
