Foreston is a city in Mille Lacs County, Minnesota, United States. The population was 533 at the 2010 census..
According to the United States Census Bureau, the city has a total area of 1.4 square miles (3.7 km²), all of it land. Minnesota Highway 23 serves as a main route in the community.
As of the census of 2000, there were 389 people, 145 households, and 95 families residing in the city. The population density was 270.7 people per square mile (104.3/km²). There were 148 housing units at an average density of 103.0 per square mile (39.7/km²). The racial makeup of the city was 99.74% White, 0.26% from other races. Hispanic or Latino of any race were 0.51% of the population.