Custer County, MT Demographics

The total population of Custer County is estimated to be 11,957 with 6,024 males (50.38%) and 5,933 females (49.62%). There are 91 less females than males in Custer County.
The median household income in Custer County was $59,911 in 2021, which marked an a decrease of 2,288(3.68%) from $62,199 in 2020. This income is 80.30% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Custer County sees its highest median household income among householders in the age group of 45 to 64 years old, at $81,187. Overall, the median household income for the county of Custer County stands at $59,911.
In Custer County, the median income for all workers aged 15 years and older, regardless of work hours, was $38,065 for males and $27,640 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $58,878 for males and $48,732 for females.
In Custer County, there are just three different racial groups among households. Among these, American Indian and Alaska Native households report a median household income of $78,366, followed by White households at $60,758, and Two or More Races households with a median household income of $39,141.
In 2022, the population of Custer County was 12,032, a 0.51% increase year-by-year from 2021. Previously, in 2021, Custer County's population was 11,971, an increase of 0.91% compared to a population of 11,863 in 2020.
The median age in Custer County, MT is 43.0, as per 2021 ACS 5-Year Estimates. Of the total population, 16.45% were under the age of 15, 17.81% aged 15 to 29, 45.50% aged 30 to 64, 18.11% aged 65 to 84, and 2.12% were 85 years of age and older.
Racial distribution of Custer County population: 92.44% are White, 0.76% are Black or African American, 0.81% are American Indian and Alaska Native, 0.25% are Asian, 0.34% are Native Hawaiian and other Pacific Islander, 1.25% are some other race and 4.14% are multiracial.