Sweet Grass County Demographics

A map of Sweet Grass County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	3,376	3,332	90.8%	90.6%
Multiracial	163	190	4.4%	5.2%
Native American/Other	90	35	2.4%	1.0%
Hispanic	45	98	1.2%	2.7%
Black	39	8	1.0%	0.2%
Asian	7	15	0.2%	0.4%

Sweet Grass County, Montana has an estimated population of 3,720, a slight increase from the 3,678 recorded in the 2020 Census. The population is 90.8% White, 4.4% Multiracial, 2.4% Native American/Other, 1.2% Hispanic, 1.0% Black, and 0.2% Asian. This demographic dot map shows the population of Sweet Grass County, with one dot drawn for each person counted by the Census, color-coded by race.

Sweet Grass 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 Sweet Grass County, that probability was 17.6% in 2020 and 17.4% in the most recent ACS estimates.

Sweet Grass County is ranked the 39th most populous county in Montana, out of 56 counties. Sweet Grass County was ranked the 39th most populous county in the 2020 Census.

Sweet Grass County's White Population

3,376 residents of Sweet Grass County, or 90.8% of the population, identify as White. The share of White residents in Sweet Grass County is higher than in Montana overall, where 83.6% of the population is White. Sweet Grass County ranks 17th statewide in terms of White residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sweet Grass County's White population has grown by an estimated 1.3%. White residents' share of Sweet Grass County's population has remained roughly unchanged at 90.8%.

Sweet Grass County is more White than neighboring Golden Valley County (90.3% White), and Carbon County (90.1% White). Sweet Grass County is less White than neighboring Stillwater County (92% White), Wheatland County (94.2% White), and Park County (90.9% White).

Sweet Grass County's Black Population

39 residents of Sweet Grass County, or 1.0% of the population, identify as Black. The share of Black residents in Sweet Grass County is comparable to the share in Montana overall, where 0.4% of the population is Black. Sweet Grass County ranks 27th statewide in terms of Black residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sweet Grass County's Black population has grown by an estimated 387.5%. Black residents' share of Sweet Grass County's population has increased from 0.2% to 1.0%.

Sweet Grass County is more Black than neighboring Stillwater County (0% Black), Park County (0.2% Black), Golden Valley County (0.8% Black), and Carbon County (0.3% Black).

Sweet Grass County's Asian Population

7 residents of Sweet Grass County, or 0.2% of the population, identify as Asian. The share of Asian residents in Sweet Grass County is comparable to the share in Montana overall, where 0.8% of the population is Asian. Sweet Grass County ranks 25th statewide in terms of Asian residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sweet Grass County's Asian population has declined by an estimated 53.3%. Asian residents' share of Sweet Grass County's population has remained roughly unchanged at 0.2%.

Sweet Grass County is more Asian than neighboring Golden Valley County (0% Asian), and Carbon County (0% Asian). Sweet Grass County is less Asian than neighboring Stillwater County (0.4% Asian), and Wheatland County (0.3% Asian).

Sweet Grass County's Hispanic Population

45 residents of Sweet Grass County, or 1.2% of the population, identify as Hispanic. The share of Hispanic residents in Sweet Grass County is slightly lower than in Montana overall, where 4.6% of the population is Hispanic. Sweet Grass County ranks 35th statewide in terms of Hispanic residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sweet Grass County's Hispanic population has declined by an estimated 54.1%. Hispanic residents' share of Sweet Grass County's population has decreased from 2.7% to 1.2%.

Sweet Grass County is less Hispanic than neighboring Stillwater County (3.5% Hispanic), Wheatland County (2.5% Hispanic), Park County (3.6% Hispanic), Golden Valley County (4.3% Hispanic), and Carbon County (3% Hispanic).

Sweet Grass County's Native American/Other Population

90 residents of Sweet Grass County, or 2.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sweet Grass County is slightly lower than in Montana overall, where 5.9% of the population is Native American/Other. Sweet Grass County ranks 48th statewide in terms of Native American/Other residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sweet Grass County's Native American/Other population has grown by an estimated 157.1%. Native American/Other residents' share of Sweet Grass County's population has increased from 1.0% to 2.4%.

Sweet Grass County is more Native American/Other than neighboring Stillwater County (0.4% Native American/Other), Wheatland County (0.6% Native American/Other), Park County (0.6% Native American/Other), Golden Valley County (0.8% Native American/Other), and Carbon County (2% Native American/Other).

Sweet Grass County's Multiracial Population

163 residents of Sweet Grass County, or 4.4% of the population, identify as Multiracial. The share of Multiracial residents in Sweet Grass County is comparable to the share in Montana overall, where 4.7% of the population is Multiracial. Sweet Grass County ranks 14th statewide in terms of Multiracial residents as a share of the population, out of 56 counties.

Since the 2020 Census, Sweet Grass County's Multiracial population has declined by an estimated 14.2%. Multiracial residents' share of Sweet Grass County's population has decreased from 5.2% to 4.4%.

Sweet Grass County is more Multiracial than neighboring Stillwater County (3.7% Multiracial), Wheatland County (1.5% Multiracial), and Golden Valley County (3.8% Multiracial). Sweet Grass County is less Multiracial than neighboring Park County (4.5% Multiracial), and Carbon County (4.5% 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.