Population in Montana 15 indicators covering population for Montana. IndicatorLatest Year10-yr change Rank Demographic balances and indicators by type of projection and NUTS 3 -0.2635 % change on previous year 2100 up 87.2% 808th Assumptions for fertility rates by age, type of projection and NUTS 3 1.73 Number 2100 down 0.0% 579th Assumptions for net migration by age, sex, type of projection and 112 Person 2100 up 119.6% 1093rd Population on 1st January by age, sex, type of projection and NUTS 3 54,234 Person 2100 down 4.3% 1128th Live births (total) by NUTS 3 region 870 Number 2024 down 26.7% 6th Population density by NUTS 3 region 31.8 Persons per square kilometre 2024 down 19.9% 1712th Population on 1 January by broad age group, sex and NUTS 3 region 112,737 Number 2025 down 17.7% 6th Population change - Demographic balance and crude rates at regional -219 2024 up 80.1% 6th Population on 1st January by age group, sex, type of projection and 64,763 Person 2100 down 0.9% 1041st Population structure indicators by type of projection and NUTS3 region 81.1 2100 up 1.5% 914th Assumptions for total fertility rates, type of projection and NUTS 3 1.75 Number 2095 down 1.2% 23rd Projected life expectancy at birth, by sex, type of projection and 84.6 Year 2095 up 2.7% 1157th Demographic balances by type of projection and NUTS3 region 4,020 2095 down 6.9% 1052nd Population on 1 January by age group, sex and NUTS 3 region 112,737 Number 2025 down 17.7% 6th Live births by age group of the mothers and NUTS 3 region 870 Number 2024 down 26.7% 6th