Brainerd, MN has a population of 13,440 and is the 3,113th largest city in the United States. The population density is 1,108 per sq mi which is 1691% higher than the Minnesota average and 1123% higher than the national average. The median age in Brainerd is 33 which is approximately 13% lower than the Minnesota average of 38. In Brainerd, 43% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 73% of Brainerd residents were born in Minnesota, 24% were born out of state, 0% were born outside of the United States and 2% were foreign born.