Sidney, MT Demographics

A map of Sidney's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	5,172	5,256	83.8%	82.8%
Hispanic	496	421	8.0%	6.6%
Multiracial	421	387	6.8%	6.1%
Native American/Other	68	143	1.1%	2.3%
Asian	14	96	0.2%	1.5%
Black	0	43	0.0%	0.7%

Sidney, Montana has an estimated population of 6,171, a slight decrease from the 6,346 recorded in the 2020 Census. The population is 83.8% White, 8.0% Hispanic, 6.8% Multiracial, 1.1% Native American/Other, 0.2% Asian, and 0.0% Black. This demographic dot map shows the population of Sidney, with one dot drawn for each person counted by the Census, color-coded by race.

Sidney has become less racially diverse since the 2020 Census. It is slightly 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 Sidney, that probability was 30.5% in 2020 and 28.6% in the most recent ACS estimates.

Sidney is ranked the 19th most populous place in Montana, out of 497 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Sidney was ranked the 19th most populous place in the 2020 Census.

Sidney's White Population

5,172 residents of Sidney, or 83.8% of the population, identify as White. The share of White residents in Sidney is comparable to the share in Montana overall, where 83.6% of the population is White. Sidney ranks 372nd statewide in terms of White residents as a share of the population, out of 497 places.

Since the 2020 Census, Sidney's White population has declined by an estimated 1.6%. White residents' share of Sidney's population has increased from 82.8% to 83.8%.

Sidney is more White than neighboring Bainville (76.3% White). Sidney is less White than neighboring Crane (100% White), Fairview (93.9% White), East Fairview (100% White), and Savage (97.8% White).

Sidney's Black Population

0 residents of Sidney, or 0.0% of the population, identify as Black. The share of Black residents in Sidney is comparable to the share in Montana overall, where 0.4% of the population is Black. Sidney ranks 51st statewide in terms of Black residents as a share of the population, out of 497 places.

Since the 2020 Census, Sidney's Black population has declined by an estimated 100.0%. Black residents' share of Sidney's population has decreased from 0.7% to 0.0%.

Sidney is less Black than neighboring Fairview (3.1% Black).

Sidney's Asian Population

14 residents of Sidney, or 0.2% of the population, identify as Asian. The share of Asian residents in Sidney is comparable to the share in Montana overall, where 0.8% of the population is Asian. Sidney ranks 23rd statewide in terms of Asian residents as a share of the population, out of 497 places.

Since the 2020 Census, Sidney's Asian population has declined by an estimated 85.4%. Asian residents' share of Sidney's population has decreased from 1.5% to 0.2%.

Sidney is more Asian than neighboring Crane (0% Asian), Fairview (0% Asian), and East Fairview (0% Asian). Sidney is less Asian than neighboring Savage (0.6% Asian), and Bainville (3% Asian).

Sidney's Hispanic Population

496 residents of Sidney, or 8.0% of the population, identify as Hispanic. The share of Hispanic residents in Sidney is slightly higher than in Montana overall, where 4.6% of the population is Hispanic. Sidney ranks 37th statewide in terms of Hispanic residents as a share of the population, out of 497 places.

Since the 2020 Census, Sidney's Hispanic population has grown by an estimated 17.8%. Hispanic residents' share of Sidney's population has increased from 6.6% to 8.0%.

Sidney is more Hispanic than neighboring Crane (0% Hispanic), Fairview (1.5% Hispanic), East Fairview (0% Hispanic), Savage (1.3% Hispanic), and Bainville (0% Hispanic).

Sidney's Native American/Other Population

68 residents of Sidney, 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 Sidney is slightly lower than in Montana overall, where 5.9% of the population is Native American/Other. Sidney ranks 192nd statewide in terms of Native American/Other residents as a share of the population, out of 497 places.

Since the 2020 Census, Sidney's Native American/Other population has declined by an estimated 52.4%. Native American/Other residents' share of Sidney's population has decreased from 2.3% to 1.1%.

Sidney is more Native American/Other than neighboring Crane (0% Native American/Other), East Fairview (0% Native American/Other), and Savage (0% Native American/Other). Sidney is less Native American/Other than neighboring Bainville (14.7% Native American/Other).

Sidney's Multiracial Population

421 residents of Sidney, or 6.8% of the population, identify as Multiracial. The share of Multiracial residents in Sidney is slightly higher than in Montana overall, where 4.7% of the population is Multiracial. Sidney ranks 135th statewide in terms of Multiracial residents as a share of the population, out of 497 places.

Since the 2020 Census, Sidney's Multiracial population has grown by an estimated 8.8%. Multiracial residents' share of Sidney's population has increased from 6.1% to 6.8%.

Sidney is more Multiracial than neighboring Crane (0% Multiracial), Fairview (0.3% Multiracial), East Fairview (0% Multiracial), Savage (0.3% Multiracial), and Bainville (6% 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.