Stewartville is a city in Olmsted County, Minnesota, United States. The population was 5,916 at the 2010 census, and was estimated to have grown to a population of 6,125 as of 2018. Stewartville has experienced growth as a result of its location just south of Rochester.

Olmsted County is a county in the U.S. state of Minnesota. As of the 2020 census, the population is 162,847. Its county seat and most populous city is Rochester.