St. Onge, SD Demographics

A map of St. Onge's Population by Race

St. Onge, South Dakota has an estimated population of 40, a dramatic decrease from the 170 recorded in the 2020 Census. The population is 100.0% White, 0.0% Black, 0.0% Asian, 0.0% Hispanic, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of St. Onge, with one dot drawn for each person counted by the Census, color-coded by race.

St. Onge has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than South Dakota overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In St. Onge, that probability was 22.6% in 2020 and 0.0% in the most recent ACS estimates.

St. Onge is ranked the 382nd most populous place in South Dakota, out of 485 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. Onge was ranked the 244th most populous place in the 2020 Census.

St. Onge's White Population

40 residents of St. Onge, or 100.0% of the population, identify as White. The share of White residents in St. Onge is significantly higher than in South Dakota overall, where 79.8% of the population is White. St. Onge ranks 288th statewide in terms of White residents as a share of the population, out of 485 places.

Since the 2020 Census, St. Onge's White population has declined by an estimated 73.2%. White residents' share of St. Onge's population has increased from 87.6% to 100.0%.

St. Onge is more White than neighboring Spearfish (87.3% White), Whitewood (91% White), Fruitdale (51.5% White), and Deadwood (90.3% White).

St. Onge's Black Population

0 residents of St. Onge, or 0.0% of the population, identify as Black. The share of Black residents in St. Onge is slightly lower than in South Dakota overall, where 2.1% of the population is Black. St. Onge ranks 183rd statewide in terms of Black residents as a share of the population, out of 485 places.

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

St. Onge is less Black than neighboring Spearfish (0.2% Black), and Deadwood (0.7% Black).

St. Onge's Asian Population

0 residents of St. Onge, or 0.0% of the population, identify as Asian. The share of Asian residents in St. Onge is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. St. Onge ranks 40th statewide in terms of Asian residents as a share of the population, out of 485 places.

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

St. Onge is less Asian than neighboring Spearfish (0.6% Asian), and Deadwood (1.7% Asian).

St. Onge's Hispanic Population

0 residents of St. Onge, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in St. Onge is slightly lower than in South Dakota overall, where 4.8% of the population is Hispanic. St. Onge ranks 75th statewide in terms of Hispanic residents as a share of the population, out of 485 places.

Since the 2020 Census, St. Onge's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of St. Onge's population has decreased from 5.9% to 0.0%.

St. Onge is less Hispanic than neighboring Spearfish (3.9% Hispanic), Whitewood (1.1% Hispanic), and Deadwood (4.5% Hispanic).

St. Onge's Native American/Other Population

0 residents of St. Onge, 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. Onge is lower than in South Dakota overall, where 7.5% of the population is Native American/Other. St. Onge ranks 270th statewide in terms of Native American/Other residents as a share of the population, out of 485 places.

Since the 2020 Census, St. Onge's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of St. Onge's population has decreased from 1.2% to 0.0%.

St. Onge is less Native American/Other than neighboring Spearfish (3.9% Native American/Other), Whitewood (2.3% Native American/Other), Fruitdale (3.7% Native American/Other), and Deadwood (0.6% Native American/Other).

St. Onge's Multiracial Population

0 residents of St. Onge, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in St. Onge is slightly lower than in South Dakota overall, where 4.4% of the population is Multiracial. St. Onge ranks 154th statewide in terms of Multiracial residents as a share of the population, out of 485 places.

Since the 2020 Census, St. Onge's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of St. Onge's population has decreased from 4.1% to 0.0%.

St. Onge is less Multiracial than neighboring Spearfish (4.1% Multiracial), Whitewood (5.6% Multiracial), Fruitdale (44.8% Multiracial), and Deadwood (2.3% 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.