Stewartville, MN has a population of 6,062 and is the 5,723rd largest city in the United States. The population density is 1,897 per sq mi which is 2966% higher than the Minnesota average and 1994% higher than the national average. The median age in Stewartville is 37 which is approximately 3% lower than the Minnesota average of 38. In Stewartville, 63% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 75% of Stewartville residents were born in Minnesota, 23% were born out of state, 0% were born outside of the United States and 1% were foreign born.