Fergus County Demographics

A map of Fergus County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	10,800	10,566	92.4%	92.3%
Hispanic	278	225	2.4%	2.0%
Native American/Other	250	157	2.1%	1.4%
Multiracial	217	439	1.9%	3.8%
Asian	76	38	0.7%	0.3%
Black	66	21	0.6%	0.2%

Fergus County, Montana has an estimated population of 11,687, a slight increase from the 11,446 recorded in the 2020 Census. The population is 92.4% White, 2.4% Hispanic, 2.1% Native American/Other, 1.9% Multiracial, 0.7% Asian, and 0.6% Black. This demographic dot map shows the population of Fergus County, with one dot drawn for each person counted by the Census, color-coded by race.

Fergus is about as racially diverse as it was in 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 Fergus County, that probability was 14.6% in 2020 and 14.5% in the most recent ACS estimates.

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

Fergus County's White Population

10,800 residents of Fergus County, or 92.4% of the population, identify as White. The share of White residents in Fergus County is higher than in Montana overall, where 83.6% of the population is White. Fergus County ranks 9th statewide in terms of White residents as a share of the population, out of 56 counties.

Since the 2020 Census, Fergus County's White population has grown by an estimated 2.2%. White residents' share of Fergus County's population has remained roughly unchanged at 92.4%.

Fergus County is more White than neighboring Golden Valley County (90.3% White), Judith Basin County (89.9% White), and Musselshell County (86.6% White). Fergus County is less White than neighboring Petroleum County (98.9% White), and Wheatland County (94.2% White).

Fergus County's Black Population

66 residents of Fergus County, or 0.6% of the population, identify as Black. The share of Black residents in Fergus County is comparable to the share in Montana overall, where 0.4% of the population is Black. Fergus County ranks 34th statewide in terms of Black residents as a share of the population, out of 56 counties.

Since the 2020 Census, Fergus County's Black population has grown by an estimated 214.3%. Black residents' share of Fergus County's population has remained roughly unchanged at 0.6%.

Fergus County is more Black than neighboring Petroleum County (0% Black), Judith Basin County (0% Black), and Musselshell County (0% Black). Fergus County is less Black than neighboring Golden Valley County (0.8% Black), and Wheatland County (1% Black).

Fergus County's Asian Population

76 residents of Fergus County, or 0.7% of the population, identify as Asian. The share of Asian residents in Fergus County is comparable to the share in Montana overall, where 0.8% of the population is Asian. Fergus County ranks 35th statewide in terms of Asian residents as a share of the population, out of 56 counties.

Since the 2020 Census, Fergus County's Asian population has grown by an estimated 100.0%. Asian residents' share of Fergus County's population has remained roughly unchanged at 0.7%.

Fergus County is more Asian than neighboring Golden Valley County (0% Asian), Wheatland County (0.3% Asian), Judith Basin County (0% Asian), and Musselshell County (0% Asian).

Fergus County's Hispanic Population

278 residents of Fergus County, or 2.4% of the population, identify as Hispanic. The share of Hispanic residents in Fergus County is slightly lower than in Montana overall, where 4.6% of the population is Hispanic. Fergus County ranks 49th statewide in terms of Hispanic residents as a share of the population, out of 56 counties.

Since the 2020 Census, Fergus County's Hispanic population has grown by an estimated 23.6%. Hispanic residents' share of Fergus County's population has remained roughly unchanged at 2.4%.

Fergus County is more Hispanic than neighboring Petroleum County (0% Hispanic). Fergus County is less Hispanic than neighboring Golden Valley County (4.3% Hispanic), Wheatland County (2.5% Hispanic), Judith Basin County (7.7% Hispanic), and Musselshell County (4.3% Hispanic).

Fergus County's Native American/Other Population

250 residents of Fergus County, or 2.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Fergus County is slightly lower than in Montana overall, where 5.9% of the population is Native American/Other. Fergus County ranks 38th statewide in terms of Native American/Other residents as a share of the population, out of 56 counties.

Since the 2020 Census, Fergus County's Native American/Other population has grown by an estimated 59.2%. Native American/Other residents' share of Fergus County's population has increased from 1.4% to 2.1%.

Fergus County is more Native American/Other than neighboring Golden Valley County (0.8% Native American/Other), Petroleum County (0.4% Native American/Other), Wheatland County (0.6% Native American/Other), and Judith Basin County (1.5% Native American/Other). Fergus County is less Native American/Other than neighboring Musselshell County (5.8% Native American/Other).

Fergus County's Multiracial Population

217 residents of Fergus County, or 1.9% of the population, identify as Multiracial. The share of Multiracial residents in Fergus County is slightly lower than in Montana overall, where 4.7% of the population is Multiracial. Fergus County ranks 39th statewide in terms of Multiracial residents as a share of the population, out of 56 counties.

Since the 2020 Census, Fergus County's Multiracial population has declined by an estimated 50.6%. Multiracial residents' share of Fergus County's population has decreased from 3.8% to 1.9%.

Fergus County is more Multiracial than neighboring Petroleum County (0% Multiracial), Wheatland County (1.5% Multiracial), and Judith Basin County (0.9% Multiracial). Fergus County is less Multiracial than neighboring Golden Valley County (3.8% Multiracial), and Musselshell County (3.3% 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.