St. Augustine, IL Demographics

A map of St. Augustine's Population by Race

St. Augustine, Illinois has an estimated population of 92, a large decrease from the 119 recorded in the 2020 Census. The population is 98.9% White, 1.1% Hispanic, 0.0% Black, 0.0% Asian, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of St. Augustine, with one dot drawn for each person counted by the Census, color-coded by race.

St. Augustine has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than Illinois overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In St. Augustine, that probability was 11.3% in 2020 and 2.1% in the most recent ACS estimates.

St. Augustine is ranked the 1343rd most populous place in Illinois, out of 1,461 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. Augustine was ranked the 1321st most populous place in the 2020 Census.

St. Augustine's White Population

91 residents of St. Augustine, or 98.9% of the population, identify as White. The share of White residents in St. Augustine is significantly higher than in Illinois overall, where 58.1% of the population is White. St. Augustine ranks 295th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, St. Augustine's White population has declined by an estimated 18.8%. White residents' share of St. Augustine's population has increased from 94.1% to 98.9%.

St. Augustine is more White than neighboring Avon (97% White), Abingdon (89.2% White), Prairie City (87.8% White), and London Mills (97.9% White). St. Augustine is less White than neighboring Ellisville (100% White).

St. Augustine's Black Population

0 residents of St. Augustine, or 0.0% of the population, identify as Black. The share of Black residents in St. Augustine is considerably lower than in Illinois overall, where 13.3% of the population is Black. St. Augustine ranks 1104th statewide in terms of Black residents as a share of the population, out of 1,461 places.

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

St. Augustine is less Black than neighboring Avon (0.7% Black), Abingdon (0.1% Black), and Prairie City (1.9% Black).

St. Augustine's Asian Population

0 residents of St. Augustine, or 0.0% of the population, identify as Asian. The share of Asian residents in St. Augustine is lower than in Illinois overall, where 5.9% of the population is Asian. St. Augustine ranks 1029th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

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

St. Augustine is less Asian than neighboring Abingdon (0.1% Asian).

St. Augustine's Hispanic Population

1 residents of St. Augustine, or 1.1% of the population, identify as Hispanic. The share of Hispanic residents in St. Augustine is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. St. Augustine ranks 1060th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, St. Augustine's Hispanic population has declined by an estimated 50.0%. Hispanic residents' share of St. Augustine's population has decreased from 1.7% to 1.1%.

St. Augustine is more Hispanic than neighboring Ellisville (0% Hispanic), and London Mills (0.6% Hispanic). St. Augustine is less Hispanic than neighboring Avon (1.7% Hispanic), Abingdon (8% Hispanic), and Prairie City (5% Hispanic).

St. Augustine's Native American/Other Population

0 residents of St. Augustine, 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. Augustine is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. St. Augustine ranks 39th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, St. Augustine's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of St. Augustine's population has decreased from 1.7% to 0.0%.

St. Augustine is less Native American/Other than neighboring Prairie City (1.6% Native American/Other).

St. Augustine's Multiracial Population

0 residents of St. Augustine, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in St. Augustine is slightly lower than in Illinois overall, where 3.4% of the population is Multiracial. St. Augustine ranks 1110th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, St. Augustine's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of St. Augustine's population has decreased from 2.5% to 0.0%.

St. Augustine is less Multiracial than neighboring Avon (0.6% Multiracial), Abingdon (2.5% Multiracial), Prairie City (3.7% Multiracial), and London Mills (1.5% 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.