Mahnomen, MN has a population of 1,261 and is the 13,728th largest city in the United States. The population density is 1,204 per sq mi which is 1846% higher than the Minnesota average and 1229% higher than the national average. The median age in Mahnomen is 44 which is approximately 16% higher than the Minnesota average of 38. In Mahnomen, 52% of the population over 15 years of age are married, 94% speak English and 1% speak Spanish. 82% of Mahnomen residents were born in Minnesota, 17% were born out of state, 0% were born outside of the United States and 1% were foreign born.