Hermantown, MN has a population of 9,599 and is the 4,056th largest city in the United States. The population density is 279 per sq mi which is 352% higher than the Minnesota average and 208% higher than the national average. The median age in Hermantown is 42 which is approximately 10% higher than the Minnesota average of 38. In Hermantown, 61% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 72% of Hermantown residents were born in Minnesota, 25% were born out of state, 0% were born outside of the United States and 2% were foreign born.