Mountain is a town in Oconto County, Wisconsin, United States. The population was 860 at the 2000 census. The census-designated place of Mountain is located within the town.
According to the United States Census Bureau, the town has a total area of 72.7 square miles (188.2 km²), of which, 71.6 square miles (185.4 km²) of it is land and 1.1 square miles (2.8 km²) of it (1.51%) is water.
As of the census of 2000, there were 860 people, 380 households, and 248 families residing in the town. The population density was 12.0 people per square mile (4.6/km²). There were 883 housing units at an average density of 12.3 per square mile (4.8/km²). The racial makeup of the town was 98.26% White, 0.47% Native American, 0.35% Asian, and 0.93% from two or more races. Hispanic or Latino of any race were 0.35% of the population.