Sheridan County Demographics

A map of Sheridan County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	3,236	3,170	88.2%	89.6%
Multiracial	180	171	4.9%	4.8%
Hispanic	145	107	4.0%	3.0%
Native American/Other	84	64	2.3%	1.8%
Asian	24	13	0.7%	0.4%
Black	0	14	0.0%	0.4%

Sheridan County, Montana has an estimated population of 3,669, an increase from the 3,539 recorded in the 2020 Census. The population is 88.2% White, 4.9% Multiracial, 4.0% Hispanic, 2.3% Native American/Other, 0.7% Asian, and 0.0% Black. This demographic dot map shows the population of Sheridan County, with one dot drawn for each person counted by the Census, color-coded by race.

Sheridan has become more 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 Sheridan County, that probability was 19.4% in 2020 and 21.8% in the most recent ACS estimates.

Sheridan County is ranked the 40th most populous county in Montana, out of 56 counties. Sheridan County was ranked the 40th most populous county in the 2020 Census.

Sheridan County's White Population

3,236 residents of Sheridan County, or 88.2% of the population, identify as White. The share of White residents in Sheridan County is slightly higher than in Montana overall, where 83.6% of the population is White. Sheridan County ranks 28th statewide in terms of White residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sheridan County's White population has grown by an estimated 2.1%. White residents' share of Sheridan County's population has decreased from 89.6% to 88.2%.

Sheridan County is more White than neighboring Roosevelt County (32.4% White), Richland County (87.5% White), Divide County (88.1% White), and Williams County (75.7% White). Sheridan County is less White than neighboring Daniels County (90.3% White).

Sheridan County's Black Population

0 residents of Sheridan County, or 0.0% of the population, identify as Black. The share of Black residents in Sheridan County is comparable to the share in Montana overall, where 0.4% of the population is Black. Sheridan County ranks 12th statewide in terms of Black residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sheridan County's Black population has declined by an estimated 100.0%. Black residents' share of Sheridan County's population has remained roughly unchanged at 0.0%.

Sheridan County is less Black than neighboring Roosevelt County (0.1% Black), Richland County (0.3% Black), Divide County (0.1% Black), Daniels County (0.3% Black), and Williams County (4.7% Black).

Sheridan County's Asian Population

24 residents of Sheridan County, or 0.7% of the population, identify as Asian. The share of Asian residents in Sheridan County is comparable to the share in Montana overall, where 0.8% of the population is Asian. Sheridan County ranks 30th statewide in terms of Asian residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sheridan County's Asian population has grown by an estimated 84.6%. Asian residents' share of Sheridan County's population has remained roughly unchanged at 0.7%.

Sheridan County is more Asian than neighboring Richland County (0.4% Asian), Divide County (0.5% Asian), and Daniels County (0.6% Asian). Sheridan County is less Asian than neighboring Roosevelt County (1% Asian), and Williams County (1.2% Asian).

Sheridan County's Hispanic Population

145 residents of Sheridan County, or 4.0% of the population, identify as Hispanic. The share of Hispanic residents in Sheridan County is comparable to the share in Montana overall, where 4.6% of the population is Hispanic. Sheridan County ranks 23rd statewide in terms of Hispanic residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sheridan County's Hispanic population has grown by an estimated 35.5%. Hispanic residents' share of Sheridan County's population has increased from 3.0% to 4.0%.

Sheridan County is more Hispanic than neighboring Roosevelt County (2.9% Hispanic), and Daniels County (3.3% Hispanic). Sheridan County is less Hispanic than neighboring Richland County (5.5% Hispanic), Divide County (4.3% Hispanic), and Williams County (10.2% Hispanic).

Sheridan County's Native American/Other Population

84 residents of Sheridan County, or 2.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sheridan County is slightly lower than in Montana overall, where 5.9% of the population is Native American/Other. Sheridan County ranks 29th statewide in terms of Native American/Other residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sheridan County's Native American/Other population has grown by an estimated 31.3%. Native American/Other residents' share of Sheridan County's population has remained roughly unchanged at 2.3%.

Sheridan County is more Native American/Other than neighboring Richland County (1.1% Native American/Other), and Divide County (0% Native American/Other). Sheridan County is less Native American/Other than neighboring Roosevelt County (55.7% Native American/Other), Daniels County (2.7% Native American/Other), and Williams County (3% Native American/Other).

Sheridan County's Multiracial Population

180 residents of Sheridan County, or 4.9% of the population, identify as Multiracial. The share of Multiracial residents in Sheridan County is comparable to the share in Montana overall, where 4.7% of the population is Multiracial. Sheridan County ranks 24th statewide in terms of Multiracial residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sheridan County's Multiracial population has grown by an estimated 5.3%. Multiracial residents' share of Sheridan County's population has remained roughly unchanged at 4.9%.

Sheridan County is more Multiracial than neighboring Daniels County (2.8% Multiracial). Sheridan County is less Multiracial than neighboring Roosevelt County (8% Multiracial), Richland County (5.3% Multiracial), Divide County (6.9% Multiracial), and Williams County (5.2% 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.