Butte-Silver Bow, MT has a population of 33,708 and is the 1,256th largest city in the United States. The population density is 47 per sq mi which is 589% higher than the Montana average and 48% lower than the national average. The median age in Butte-Silver Bow is 41 which is approximately 3% higher than the Montana average of 40. In Butte-Silver Bow, 53% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 67% of Butte-Silver Bow residents were born in Montana, 30% were born out of state, 1% were born outside of the United States and 3% were foreign born.