Boulder, MT Demographics

A map of Boulder's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	1,154	1,050	89.9%	87.4%
Native American/Other	59	39	4.6%	3.2%
Hispanic	36	32	2.8%	2.7%
Multiracial	35	75	2.7%	6.2%
Black	0	2	0.0%	0.2%
Asian	0	3	0.0%	0.2%

Boulder, Montana has an estimated population of 1,284, an increase from the 1,201 recorded in the 2020 Census. The population is 89.9% White, 4.6% Native American/Other, 2.8% Hispanic, 2.7% Multiracial, 0.0% Black, and 0.0% Asian. This demographic dot map shows the population of Boulder, with one dot drawn for each person counted by the Census, color-coded by race.

Boulder 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 Boulder, that probability was 23.0% in 2020 and 18.9% in the most recent ACS estimates.

Boulder is ranked the 79th 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). Boulder was ranked the 80th most populous place in the 2020 Census.

Boulder's White Population

1,154 residents of Boulder, or 89.9% of the population, identify as White. The share of White residents in Boulder is higher than in Montana overall, where 83.6% of the population is White. Boulder ranks 297th statewide in terms of White residents as a share of the population, out of 497 places.

Since the 2020 Census, Boulder's White population has grown by an estimated 9.9%. White residents' share of Boulder's population has increased from 87.4% to 89.9%.

Boulder is more White than neighboring Basin (83.5% White), and Clancy (88.8% White). Boulder is less White than neighboring Jefferson City (96.2% White), Elkhorn (100% White), and Rimini (100% White).

Boulder's Black Population

0 residents of Boulder, or 0.0% of the population, identify as Black. The share of Black residents in Boulder is comparable to the share in Montana overall, where 0.4% of the population is Black. Boulder ranks 147th statewide in terms of Black residents as a share of the population, out of 497 places.

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

Boulder's Asian Population

0 residents of Boulder, or 0.0% of the population, identify as Asian. The share of Asian residents in Boulder is comparable to the share in Montana overall, where 0.8% of the population is Asian. Boulder ranks 185th statewide in terms of Asian residents as a share of the population, out of 497 places.

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

Boulder is less Asian than neighboring Basin (5.7% Asian).

Boulder's Hispanic Population

36 residents of Boulder, or 2.8% of the population, identify as Hispanic. The share of Hispanic residents in Boulder is comparable to the share in Montana overall, where 4.6% of the population is Hispanic. Boulder ranks 255th statewide in terms of Hispanic residents as a share of the population, out of 497 places.

Since the 2020 Census, Boulder's Hispanic population has grown by an estimated 12.5%. Hispanic residents' share of Boulder's population has remained roughly unchanged at 2.8%.

Boulder is more Hispanic than neighboring Jefferson City (0% Hispanic), Elkhorn (0% Hispanic), Clancy (1% Hispanic), and Rimini (0% Hispanic). Boulder is less Hispanic than neighboring Basin (10.8% Hispanic).

Boulder's Native American/Other Population

59 residents of Boulder, or 4.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Boulder is comparable to the share in Montana overall, where 5.9% of the population is Native American/Other. Boulder ranks 144th statewide in terms of Native American/Other residents as a share of the population, out of 497 places.

Since the 2020 Census, Boulder's Native American/Other population has grown by an estimated 51.3%. Native American/Other residents' share of Boulder's population has increased from 3.2% to 4.6%.

Boulder is more Native American/Other than neighboring Jefferson City (0% Native American/Other), Basin (0% Native American/Other), Elkhorn (0% Native American/Other), Clancy (2% Native American/Other), and Rimini (0% Native American/Other).

Boulder's Multiracial Population

35 residents of Boulder, or 2.7% of the population, identify as Multiracial. The share of Multiracial residents in Boulder is comparable to the share in Montana overall, where 4.7% of the population is Multiracial. Boulder ranks 124th statewide in terms of Multiracial residents as a share of the population, out of 497 places.

Since the 2020 Census, Boulder's Multiracial population has declined by an estimated 53.3%. Multiracial residents' share of Boulder's population has decreased from 6.2% to 2.7%.

Boulder is more Multiracial than neighboring Basin (0% Multiracial), Elkhorn (0% Multiracial), and Rimini (0% Multiracial). Boulder is less Multiracial than neighboring Jefferson City (3.8% Multiracial), and Clancy (8.3% 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.