Blaine County Demographics

A map of Blaine County's Population by Race

Blaine County, Montana has an estimated population of 6,949, a slight decrease from the 7,044 recorded in the 2020 Census. The population is 47.0% Native American/Other, 44.1% White, 5.6% Multiracial, 2.8% Hispanic, 0.4% Black, and 0.1% Asian. This demographic dot map shows the population of Blaine County, with one dot drawn for each person counted by the Census, color-coded by race.

Blaine has become more racially diverse since the 2020 Census. It is considerably more diverse than Montana overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Blaine County, that probability was 55.4% in 2020 and 58.1% in the most recent ACS estimates.

Blaine County is ranked the 31st most populous county in Montana, out of 56 counties. Blaine County was ranked the 29th most populous county in the 2020 Census.

Blaine County's White Population

3,062 residents of Blaine County, or 44.1% of the population, identify as White. The share of White residents in Blaine County is significantly lower than in Montana overall, where 83.6% of the population is White. Blaine County ranks 53rd statewide in terms of White residents as a share of the population, out of 56 counties.

Since the 2020 Census, Blaine County's White population has grown by an estimated 4.1%. White residents' share of Blaine County's population has increased from 41.8% to 44.1%.

Blaine County is less White than neighboring Phillips County (81% White), Hill County (67.1% White), Fergus County (92.4% White), Petroleum County (98.9% White), and Chouteau County (75.4% White).

Blaine County's Black Population

29 residents of Blaine County, or 0.4% of the population, identify as Black. The share of Black residents in Blaine County is comparable to the share in Montana overall, where 0.4% of the population is Black. Blaine County ranks 40th statewide in terms of Black residents as a share of the population, out of 56 counties.

Since the 2020 Census, Blaine County's Black population has grown by an estimated 190.0%. Black residents' share of Blaine County's population has remained roughly unchanged at 0.4%.

Blaine County is more Black than neighboring Phillips County (0.2% Black), Hill County (0.3% Black), Petroleum County (0% Black), and Chouteau County (0.1% Black). Blaine County is less Black than neighboring Fergus County (0.6% Black).

Blaine County's Asian Population

7 residents of Blaine County, or 0.1% of the population, identify as Asian. The share of Asian residents in Blaine County is comparable to the share in Montana overall, where 0.8% of the population is Asian. Blaine County ranks 46th statewide in terms of Asian residents as a share of the population, out of 56 counties.

Since the 2020 Census, Blaine County's Asian population has declined by an estimated 46.2%. Asian residents' share of Blaine County's population has remained roughly unchanged at 0.1%.

Blaine County is less Asian than neighboring Phillips County (0.8% Asian), Hill County (0.2% Asian), Fergus County (0.7% Asian), and Petroleum County (0.7% Asian).

Blaine County's Hispanic Population

194 residents of Blaine County, or 2.8% of the population, identify as Hispanic. The share of Hispanic residents in Blaine County is comparable to the share in Montana overall, where 4.6% of the population is Hispanic. Blaine County ranks 44th statewide in terms of Hispanic residents as a share of the population, out of 56 counties.

Since the 2020 Census, Blaine County's Hispanic population has grown by an estimated 22.8%. Hispanic residents' share of Blaine County's population has increased from 2.2% to 2.8%.

Blaine County is more Hispanic than neighboring Phillips County (1.1% Hispanic), Fergus County (2.4% Hispanic), and Petroleum County (0% Hispanic). Blaine County is less Hispanic than neighboring Hill County (3.5% Hispanic), and Chouteau County (3.1% Hispanic).

Blaine County's Native American/Other Population

3,268 residents of Blaine County, or 47.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Blaine County is significantly higher than in Montana overall, where 5.9% of the population is Native American/Other. Blaine County ranks 4th statewide in terms of Native American/Other residents as a share of the population, out of 56 counties.

Since the 2020 Census, Blaine County's Native American/Other population has declined by an estimated 10.6%. Native American/Other residents' share of Blaine County's population has decreased from 51.9% to 47.0%.

Blaine County is more Native American/Other than neighboring Phillips County (8.1% Native American/Other), Hill County (22.6% Native American/Other), Fergus County (2.1% Native American/Other), Petroleum County (0.4% Native American/Other), and Chouteau County (16.6% Native American/Other).

Blaine County's Multiracial Population

389 residents of Blaine County, or 5.6% of the population, identify as Multiracial. The share of Multiracial residents in Blaine County is comparable to the share in Montana overall, where 4.7% of the population is Multiracial. Blaine County ranks 42nd statewide in terms of Multiracial residents as a share of the population, out of 56 counties.

Since the 2020 Census, Blaine County's Multiracial population has grown by an estimated 46.8%. Multiracial residents' share of Blaine County's population has increased from 3.8% to 5.6%.

Blaine County is more Multiracial than neighboring Fergus County (1.9% Multiracial), Petroleum County (0% Multiracial), and Chouteau County (4.8% Multiracial). Blaine County is less Multiracial than neighboring Phillips County (8.7% Multiracial), and Hill County (6.3% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.