North Mankato, MN has a population of 13,451 and is the 3,109th largest city in the United States. The population density is 2,224 per sq mi which is 2989% higher than the Minnesota average and 2355% higher than the national average. The median age in North Mankato is 38 which is approximately 2% higher than the Minnesota average of 38. In North Mankato, 61% of the population over 15 years of age are married, 94% speak English and 2% speak Spanish. 76% of North Mankato residents were born in Minnesota, 19% were born out of state, 0% were born outside of the United States and 5% were foreign born.