St. Marie, MT Demographics

A map of St. Marie's Population by Race

St. Marie, Montana has an estimated population of 306, a dramatic decrease from the 489 recorded in the 2020 Census. The population is 55.9% White, 44.1% Multiracial, 0.0% Black, 0.0% Asian, 0.0% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of St. Marie, with one dot drawn for each person counted by the Census, color-coded by race.

St. Marie has become considerably more 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 St. Marie, that probability was 21.2% in 2020 and 49.3% in the most recent ACS estimates.

St. Marie is ranked the 202nd 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). St. Marie was ranked the 153rd most populous place in the 2020 Census.

St. Marie's White Population

171 residents of St. Marie, or 55.9% of the population, identify as White. The share of White residents in St. Marie is significantly lower than in Montana overall, where 83.6% of the population is White. St. Marie ranks 257th statewide in terms of White residents as a share of the population, out of 497 places.

Since the 2020 Census, St. Marie's White population has declined by an estimated 60.5%. White residents' share of St. Marie's population has decreased from 88.5% to 55.9%.

St. Marie is less White than neighboring Glasgow (92.4% White), Nashua (81.4% White), Fort Peck (88.9% White), Opheim (96.5% White), and Hinsdale (81.5% White).

St. Marie's Black Population

0 residents of St. Marie, or 0.0% of the population, identify as Black. The share of Black residents in St. Marie is comparable to the share in Montana overall, where 0.4% of the population is Black. St. Marie ranks 139th statewide in terms of Black residents as a share of the population, out of 497 places.

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

St. Marie is less Black than neighboring Glasgow (0.8% Black).

St. Marie's Asian Population

0 residents of St. Marie, or 0.0% of the population, identify as Asian. The share of Asian residents in St. Marie is comparable to the share in Montana overall, where 0.8% of the population is Asian. St. Marie ranks 33rd statewide in terms of Asian residents as a share of the population, out of 497 places.

Since the 2020 Census, St. Marie's Asian population has declined by an estimated 100.0%. Asian residents' share of St. Marie's population has decreased from 1.2% to 0.0%.

St. Marie is less Asian than neighboring Nashua (0.4% Asian).

St. Marie's Hispanic Population

0 residents of St. Marie, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in St. Marie is slightly lower than in Montana overall, where 4.6% of the population is Hispanic. St. Marie ranks 181st statewide in terms of Hispanic residents as a share of the population, out of 497 places.

Since the 2020 Census, St. Marie's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of St. Marie's population has decreased from 3.5% to 0.0%.

St. Marie is less Hispanic than neighboring Glasgow (0.6% Hispanic), Nashua (4.7% Hispanic), and Hinsdale (9.9% Hispanic).

St. Marie's Native American/Other Population

0 residents of St. Marie, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in St. Marie is lower than in Montana overall, where 5.9% of the population is Native American/Other. St. Marie ranks 210th statewide in terms of Native American/Other residents as a share of the population, out of 497 places.

Since the 2020 Census, St. Marie's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of St. Marie's population has decreased from 2.0% to 0.0%.

St. Marie is less Native American/Other than neighboring Glasgow (4% Native American/Other), Nashua (9.7% Native American/Other), Fort Peck (6.8% Native American/Other), and Hinsdale (7.7% Native American/Other).

St. Marie's Multiracial Population

135 residents of St. Marie, or 44.1% of the population, identify as Multiracial. The share of Multiracial residents in St. Marie is significantly higher than in Montana overall, where 4.7% of the population is Multiracial. St. Marie ranks 236th statewide in terms of Multiracial residents as a share of the population, out of 497 places.

Since the 2020 Census, St. Marie's Multiracial population has grown by an estimated 513.6%. Multiracial residents' share of St. Marie's population has increased from 4.5% to 44.1%.

St. Marie is more Multiracial than neighboring Glasgow (2.1% Multiracial), Nashua (3.9% Multiracial), Fort Peck (4.3% Multiracial), Opheim (3.5% Multiracial), and Hinsdale (0.9% 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.