Malmstrom AFB, MT has a population of 3,933 and is the 7,518th largest city in the United States. The population density is 769 per sq mi which is 11158% higher than the Montana average and 749% higher than the national average. The median age in Malmstrom AFB is 23 which is approximately 43% lower than the Montana average of 40. In Malmstrom AFB, 73% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 17% of Malmstrom AFB residents were born in Montana, 73% were born out of state, 7% were born outside of the United States and 3% were foreign born.