Richland County Demographics

A map of Richland County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	9,826	9,892	87.5%	86.1%
Hispanic	620	605	5.5%	5.3%
Multiracial	593	596	5.3%	5.2%
Native American/Other	118	216	1.1%	1.9%
Asian	48	121	0.4%	1.1%
Black	30	61	0.3%	0.5%

Richland County, Montana has an estimated population of 11,235, a slight decrease from the 11,491 recorded in the 2020 Census. The population is 87.5% White, 5.5% Hispanic, 5.3% Multiracial, 1.1% Native American/Other, 0.4% Asian, and 0.3% Black. This demographic dot map shows the population of Richland County, with one dot drawn for each person counted by the Census, color-coded by race.

Richland has become less racially diverse since the 2020 Census. It is considerably less 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 Richland County, that probability was 25.3% in 2020 and 22.9% in the most recent ACS estimates.

Richland County is ranked the 19th most populous county in Montana, out of 56 counties. Richland County was ranked the 18th most populous county in the 2020 Census.

Richland County's White Population

9,826 residents of Richland County, or 87.5% of the population, identify as White. The share of White residents in Richland County is slightly higher than in Montana overall, where 83.6% of the population is White. Richland County ranks 41st statewide in terms of White residents as a share of the population, out of 56 counties.

Since the 2020 Census, Richland County's White population has remained roughly the same. White residents' share of Richland County's population has increased from 86.1% to 87.5%.

Richland County is more White than neighboring Roosevelt County (32.4% White). Richland County is less White than neighboring Dawson County (90.4% White), Wibaux County (89.2% White), Sheridan County (88.2% White), and Golden Valley County (90.7% White).

Richland County's Black Population

30 residents of Richland County, or 0.3% of the population, identify as Black. The share of Black residents in Richland County is comparable to the share in Montana overall, where 0.4% of the population is Black. Richland County ranks 9th statewide in terms of Black residents as a share of the population, out of 56 counties.

Since the 2020 Census, Richland County's Black population has declined by an estimated 50.8%. Black residents' share of Richland County's population has remained roughly unchanged at 0.3%.

Richland County is more Black than neighboring Dawson County (0.2% Black), Roosevelt County (0.1% Black), Sheridan County (0% Black), and Golden Valley County (0.2% Black). Richland County is less Black than neighboring Wibaux County (0.6% Black).

Richland County's Asian Population

48 residents of Richland County, or 0.4% of the population, identify as Asian. The share of Asian residents in Richland County is comparable to the share in Montana overall, where 0.8% of the population is Asian. Richland County ranks 4th statewide in terms of Asian residents as a share of the population, out of 56 counties.

Since the 2020 Census, Richland County's Asian population has declined by an estimated 60.3%. Asian residents' share of Richland County's population has decreased from 1.1% to 0.4%.

Richland County is more Asian than neighboring Dawson County (0.2% Asian), Wibaux County (0.1% Asian), and Golden Valley County (0.2% Asian). Richland County is less Asian than neighboring Roosevelt County (1% Asian), and Sheridan County (0.7% Asian).

Richland County's Hispanic Population

620 residents of Richland County, or 5.5% of the population, identify as Hispanic. The share of Hispanic residents in Richland County is comparable to the share in Montana overall, where 4.6% of the population is Hispanic. Richland County ranks 2nd statewide in terms of Hispanic residents as a share of the population, out of 56 counties.

Since the 2020 Census, Richland County's Hispanic population has grown by an estimated 2.5%. Hispanic residents' share of Richland County's population has remained roughly unchanged at 5.5%.

Richland County is more Hispanic than neighboring Dawson County (3.6% Hispanic), Roosevelt County (2.9% Hispanic), Sheridan County (4% Hispanic), and Golden Valley County (0.6% Hispanic). Richland County is less Hispanic than neighboring Wibaux County (7.7% Hispanic).

Richland County's Native American/Other Population

118 residents of Richland County, or 1.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Richland County is slightly lower than in Montana overall, where 5.9% of the population is Native American/Other. Richland County ranks 28th statewide in terms of Native American/Other residents as a share of the population, out of 56 counties.

Since the 2020 Census, Richland County's Native American/Other population has declined by an estimated 45.4%. Native American/Other residents' share of Richland County's population has decreased from 1.9% to 1.1%.

Richland County is less Native American/Other than neighboring Dawson County (2.1% Native American/Other), Roosevelt County (55.7% Native American/Other), Wibaux County (2% Native American/Other), Sheridan County (2.3% Native American/Other), and Golden Valley County (1.3% Native American/Other).

Richland County's Multiracial Population

593 residents of Richland County, or 5.3% of the population, identify as Multiracial. The share of Multiracial residents in Richland County is comparable to the share in Montana overall, where 4.7% of the population is Multiracial. Richland County ranks 13th statewide in terms of Multiracial residents as a share of the population, out of 56 counties.

Since the 2020 Census, Richland County's Multiracial population has remained roughly the same. Multiracial residents' share of Richland County's population has remained roughly unchanged at 5.3%.

Richland County is more Multiracial than neighboring Dawson County (3.4% Multiracial), Wibaux County (0.4% Multiracial), and Sheridan County (4.9% Multiracial). Richland County is less Multiracial than neighboring Roosevelt County (8% Multiracial), and Golden Valley County (7% 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.