Biddle, MT has a population of 29 and is the 28,626th largest city in the United States. The population density is 2 per sq mi which is 75% lower than the Montana average and 98% lower than the national average. The median age in Biddle is 47 which is approximately 19% higher than the Montana average of 40. In Biddle, 39% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 17% of Biddle residents were born in Montana, 83% were born out of state, 0% were born outside of the United States and 0% were foreign born.