Sources and methodology

American Indian and Alaska Native areas

This is the American Indian and Alaska Native area (AIANA) in Montana as defined by the Census Bureau. Across the country, AIANAs include reservations and trust lands, tribal jurisdiction statistical areas, Alaska Native Regional Corporations, Alaska Native village statistical areas, and tribal designated statistical areas. In Montana, there are American Indian reservations and trust lands. We included AIANAs with populations of at least 100 residents in this table.

Number of people in state prison from each AIANA, 2020

This is the number of people from each American Indian and Alaska Native area in state prison as of 2020. See the methodology section of the report.

Census population, 2020

This is the population of the American Indian and Alaska Native area as reported in the 2020 Census.

Total population, 2020

This is the total population of the American Indian and Alaska Native area as reflected in the 2020 Census plus the imprisoned population.

Imprisonment rate per 100,000

This is the number of imprisoned people divided by the total population and then multiplied by 100,000. It allows ready comparison of the frequency of imprisonment between each American Indian and Alaska Native area of different population sizes.