Illiopolis, IL Demographics

A map of Illiopolis's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	846	791	95.1%	93.5%
Black	18	1	2.0%	0.1%
Multiracial	13	39	1.5%	4.6%
Asian	7	0	0.8%	0.0%
Hispanic	6	12	0.7%	1.4%
Native American/Other	0	3	0.0%	0.4%

Illiopolis, Illinois has an estimated population of 890, an increase from the 846 recorded in the 2020 Census. The population is 95.1% White, 2.0% Black, 1.5% Multiracial, 0.8% Asian, 0.7% Hispanic, and 0.0% Native American/Other. This demographic dot map shows the population of Illiopolis, with one dot drawn for each person counted by the Census, color-coded by race.

Illiopolis has become 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 Illiopolis, that probability was 12.3% in 2020 and 9.6% in the most recent ACS estimates.

Illiopolis is ranked the 734th 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). Illiopolis was ranked the 742nd most populous place in the 2020 Census.

Illiopolis's White Population

846 residents of Illiopolis, or 95.1% of the population, identify as White. The share of White residents in Illiopolis is significantly higher than in Illinois overall, where 58.1% of the population is White. Illiopolis ranks 400th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Illiopolis's White population has grown by an estimated 7.0%. White residents' share of Illiopolis's population has increased from 93.5% to 95.1%.

Illiopolis is more White than neighboring Mount Auburn (87.2% White), Niantic (81.2% White), Latham (81.5% White), Buffalo (87.1% White), and Mechanicsburg (91.5% White).

Illiopolis's Black Population

18 residents of Illiopolis, or 2.0% of the population, identify as Black. The share of Black residents in Illiopolis is considerably lower than in Illinois overall, where 13.3% of the population is Black. Illiopolis ranks 1085th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Illiopolis's Black population has grown by an estimated 1700.0%. Black residents' share of Illiopolis's population has increased from 0.1% to 2.0%.

Illiopolis is more Black than neighboring Mount Auburn (0% Black), Niantic (0% Black), Buffalo (0% Black), and Mechanicsburg (0% Black). Illiopolis is less Black than neighboring Latham (6.4% Black).

Illiopolis's Asian Population

7 residents of Illiopolis, or 0.8% of the population, identify as Asian. The share of Asian residents in Illiopolis is lower than in Illinois overall, where 5.9% of the population is Asian. Illiopolis ranks 1029th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Illiopolis's Asian population has grown from 0 to an estimated 7. Asian residents' share of Illiopolis's population has increased from 0.0% to 0.8%.

Illiopolis is more Asian than neighboring Mount Auburn (0% Asian), Niantic (0% Asian), Latham (0.7% Asian), Buffalo (0.2% Asian), and Mechanicsburg (0% Asian).

Illiopolis's Hispanic Population

6 residents of Illiopolis, or 0.7% of the population, identify as Hispanic. The share of Hispanic residents in Illiopolis is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Illiopolis ranks 1134th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Illiopolis's Hispanic population has declined by an estimated 50.0%. Hispanic residents' share of Illiopolis's population has decreased from 1.4% to 0.7%.

Illiopolis is more Hispanic than neighboring Latham (0% Hispanic). Illiopolis is less Hispanic than neighboring Mount Auburn (4.5% Hispanic), Niantic (10% Hispanic), Buffalo (1.5% Hispanic), and Mechanicsburg (1.1% Hispanic).

Illiopolis's Native American/Other Population

0 residents of Illiopolis, 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 Illiopolis is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Illiopolis ranks 797th statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Illiopolis's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Illiopolis's population has remained roughly unchanged at 0.0%.

Illiopolis is less Native American/Other than neighboring Mount Auburn (1.3% Native American/Other), and Niantic (0.6% Native American/Other).

Illiopolis's Multiracial Population

13 residents of Illiopolis, or 1.5% of the population, identify as Multiracial. The share of Multiracial residents in Illiopolis is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Illiopolis ranks 344th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Illiopolis's Multiracial population has declined by an estimated 66.7%. Multiracial residents' share of Illiopolis's population has decreased from 4.6% to 1.5%.

Illiopolis is less Multiracial than neighboring Mount Auburn (7% Multiracial), Niantic (8.2% Multiracial), Latham (11.4% Multiracial), Buffalo (11.2% Multiracial), and Mechanicsburg (7.4% 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.