Get ready-to-use data, reports, analysis, and visualizations covering the demographics of Roosevelt County, Montana based on the current United States Census Bureau's 2023 American Community Survey (ACS) 5-Year Estimates.
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Roosevelt County, Montana Demographics: Sex by Age

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the total population of Roosevelt County, Montana is 10,665. The median age of the population in Roosevelt County, Montana is 30.5. The median age for males is 28.9 years, and for females, it is 32.4 years.
The age distribution of the population in Roosevelt County, Montana is as follows:
- Under 5 years: 8.44%
- 5–17 years (children): 24.91%
- 18–24 years (young adults): 9.10%
- 25–34 years: 13.67%
- 35–54 years: 20.66%
- 55–64 years: 11.34%
- 65 years and over (seniors): 11.89%
The total dependency ratio in Roosevelt County, Montana is 82.62%. The youth dependency ratio is 60.91%, and the old-age dependency ratio is 21.71%. In demographic terms, the dependency ratio measures the size of the population typically not in the labor force (children and older adults) relative to those of working age.
Roosevelt County, Montana Demographics: Population by Race & Ethnicity

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the breakdown of the population in Roosevelt County, Montana by race and ethnicity (racial demographics) is as follows:
- White: 32.95%
- Black/African American: 0.12%
- American Indian and Alaska Native: 57.22%
- Asian: 0.80%
- Native Hawaiian or Other Pacific Islander: 0.02%
- Some other race: 0.12%
- Two or more races: 6.07%
- Hispanic or Latino: 2.71%
The diversity index score in Roosevelt County, Montana is 55.96%, suggesting a moderate level of diversity.
Roosevelt County, Montana Demographics: Household Income

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the median household income in Roosevelt County, Montana over the past 12 months, adjusted for 2023 inflation, was $53,125.
The distribution of household income by income bracket in Roosevelt County, Montana is as follows:
- Less than $20,000: 24.13%
- $20,000–$34,999: 10.74%
- $35,000–$49,999: 12.55%
- $50,000–$74,999: 21.65%
- $75,000–$149,999: 22.16%
- $150,000 or more: 8.77%
Roosevelt County, Montana Demographics: Educational Attainment

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the breakdown of the total population of Roosevelt County, Montana, age 25 and older, by educational level is as follows:
- Less than high school graduate: 8.18%
- High school graduate (incl. equivalency): 33.11%
- Some college or associate's degree: 38.86%
- Bachelor's Degree: 14.01%
- Graduate or professional degree: 5.85%
In Roosevelt County, Montana, 19.86% of the population has a bachelor's degree or higher, while 91.82% are high school graduates or higher.
Roosevelt County, Montana Demographics: Health Insurance Coverage Status by Sex by Age

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the uninsured rate in Roosevelt County, Montana is 29.57%.
Rates of people in Roosevelt County, Montana lacking health insurance coverage, by age group and sex are as follows:
- Under 18: 22.88% of males and 44.23% of females are uninsured
- Ages 18–34: 34.85% of males and 32.08% of females are uninsured
- Ages 35–64: 36.53% of males and 38.86% of females are uninsured
- Ages 65 and older: 1.70% of males and 11.96% of females are uninsured
Roosevelt County, Montana Demographics: Nativity and Citizenship Status in the United States

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 99.60% of people living in Roosevelt County, Montana are U.S. citizens. This includes individuals born in the United States, Puerto Rico, or U.S. Island Areas, those born abroad to American parents, and those who became citizens through naturalization. 0.72% of the population obtained U.S. citizenship through the naturalization process. In Roosevelt County, Montana, 0.72% of the population are naturalized immigrants, who obtained U.S. citizenship through the immigration and naturalization process.
Roosevelt County, Montana Demographics: Means of Transportation to Work

According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the means of transportation to work for the population of Roosevelt County, Montana are distributed as follows:
- Car, truck, or van: 88.52%
- Public transportation (excluding taxicab): 0.14%
- Bicycle: 0.17%
- Walked: 7.63%
- Taxicab, motorcycle, or other means: 0.47%
- Worked from home: 3.08%
Frequently Asked Questions
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the age breakdown of the population of Roosevelt County, Montana is as follows:
- Under 5: 8.44%
- Ages 5–17: 24.91%
- Ages 18–24: 9.10%
- Ages 25–34: 13.67%
- Ages 35–54: 20.66%
- Ages 55–64: 11.34%
- 65 or older: 11.89%
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the racial demographics of the population of Roosevelt County, Montana are as follows:
- White: 32.95%
- Black/African American: 0.12%
- American Indian and Alaska Native: 57.22%
- Asian: 0.80%
- Native Hawaiian or Other Pacific Islander: 0.02%
- Some other race: 0.12%
- Two or more races: 6.07%
- Hispanic or Latino: 2.71%
* Hispanic includes respondents of any race. Other categories are non-Hispanic.
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the distribution of household income in Roosevelt County, Montana by income bracket is as follows:
- Less than $20,000: 24.13%
- $20,000–$34,999: 10.74%
- $35,000–$49,999: 12.55%
- $50,000–$74,999: 21.65%
- $75,000–$149,999: 22.16%
- $150,000 or more: 8.77%
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, the median household income in Roosevelt County, Montana in the past 12 months, in 2023 inflation-adjusted dollars, was $53,125.
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 32.95% of the population in Roosevelt County, Montana identifies as White alone (not Hispanic or Latino).
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 0.12% of the population in Roosevelt County, Montana identifies as Black or African American alone (not Hispanic or Latino).
According to the U.S. Census Bureau’s 2023 American Community Survey (ACS) 5-Year Estimates, 29.57% of the population of Roosevelt County, Montana lacks health insurance coverage.
The detailed breakdown by age and sex is as follows:
- Under 18: 22.88% of males and 44.23% of females
- Ages 18–34: 34.85% of males and 32.08% of females
- Ages 35–64: 36.53% of males and 38.86% of females
- Ages 65 and over: 1.70% of males and 11.96% of females