Big Arm, MT Demographics

A map of Big Arm's Population by Race

Big Arm, Montana has an estimated population of 190, a large decrease from the 218 recorded in the 2020 Census. The population is 68.9% Native American/Other, 31.1% White, 0.0% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Multiracial. This demographic dot map shows the population of Big Arm, with one dot drawn for each person counted by the Census, color-coded by race.

Big Arm has become considerably less racially diverse since the 2020 Census. It is considerably more 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 Big Arm, that probability was 56.8% in 2020 and 42.8% in the most recent ACS estimates.

Big Arm is ranked the 257th 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). Big Arm was ranked the 231st most populous place in the 2020 Census.

Big Arm's White Population

59 residents of Big Arm, or 31.1% of the population, identify as White. The share of White residents in Big Arm is significantly lower than in Montana overall, where 83.6% of the population is White. Big Arm ranks 445th statewide in terms of White residents as a share of the population, out of 497 places.

Since the 2020 Census, Big Arm's White population has declined by an estimated 29.8%. White residents' share of Big Arm's population has decreased from 38.5% to 31.1%.

Big Arm is more White than neighboring Elmo (9.7% White). Big Arm is less White than neighboring Lindisfarne (92.1% White), Dayton (92% White), Rocky Point (88.7% White), and Jette (81.2% White).

Big Arm's Black Population

0 residents of Big Arm, or 0.0% of the population, identify as Black. The share of Black residents in Big Arm is comparable to the share in Montana overall, where 0.4% of the population is Black. Big Arm ranks 179th statewide in terms of Black residents as a share of the population, out of 497 places.

Since the 2020 Census, Big Arm's Black population has grown from 0 to an estimated 0. Black residents' share of Big Arm's population has remained roughly unchanged at 0.0%.

Big Arm's Asian Population

0 residents of Big Arm, or 0.0% of the population, identify as Asian. The share of Asian residents in Big Arm is comparable to the share in Montana overall, where 0.8% of the population is Asian. Big Arm ranks 215th statewide in terms of Asian residents as a share of the population, out of 497 places.

Since the 2020 Census, Big Arm's Asian population has grown from 0 to an estimated 0. Asian residents' share of Big Arm's population has remained roughly unchanged at 0.0%.

Big Arm's Hispanic Population

0 residents of Big Arm, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Big Arm is slightly lower than in Montana overall, where 4.6% of the population is Hispanic. Big Arm ranks 347th statewide in terms of Hispanic residents as a share of the population, out of 497 places.

Since the 2020 Census, Big Arm's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Big Arm's population has decreased from 1.4% to 0.0%.

Big Arm's Native American/Other Population

131 residents of Big Arm, or 68.9% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Big Arm is significantly higher than in Montana overall, where 5.9% of the population is Native American/Other. Big Arm ranks 38th statewide in terms of Native American/Other residents as a share of the population, out of 497 places.

Since the 2020 Census, Big Arm's Native American/Other population has grown by an estimated 13.9%. Native American/Other residents' share of Big Arm's population has increased from 52.8% to 68.9%.

Big Arm is more Native American/Other than neighboring Lindisfarne (0.9% Native American/Other), Dayton (0% Native American/Other), Rocky Point (0% Native American/Other), and Jette (16.1% Native American/Other). Big Arm is less Native American/Other than neighboring Elmo (90.3% Native American/Other).

Big Arm's Multiracial Population

0 residents of Big Arm, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in Big Arm is slightly lower than in Montana overall, where 4.7% of the population is Multiracial. Big Arm ranks 83rd statewide in terms of Multiracial residents as a share of the population, out of 497 places.

Since the 2020 Census, Big Arm's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of Big Arm's population has decreased from 7.3% to 0.0%.

Big Arm is less Multiracial than neighboring Lindisfarne (6.9% Multiracial), Dayton (8% Multiracial), Rocky Point (11.3% Multiracial), and Jette (2.8% 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.