Eureka, IL Demographics

A map of Eureka's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	4,609	4,788	92.1%	91.6%
Hispanic	138	117	2.8%	2.2%
Multiracial	119	187	2.4%	3.6%
Black	89	87	1.8%	1.7%
Native American/Other	40	16	0.8%	0.3%
Asian	12	32	0.2%	0.6%

Eureka, Illinois has an estimated population of 5,007, a decrease from the 5,227 recorded in the 2020 Census. The population is 92.1% White, 2.8% Hispanic, 2.4% Multiracial, 1.8% Black, 0.8% Native American/Other, and 0.2% Asian. This demographic dot map shows the population of Eureka, with one dot drawn for each person counted by the Census, color-coded by race.

Eureka has become slightly 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 Eureka, that probability was 15.9% in 2020 and 15.1% in the most recent ACS estimates.

Eureka is ranked the 337th 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). Eureka was ranked the 327th most populous place in the 2020 Census.

Eureka's White Population

4,609 residents of Eureka, or 92.1% of the population, identify as White. The share of White residents in Eureka is significantly higher than in Illinois overall, where 58.1% of the population is White. Eureka ranks 647th statewide in terms of White residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Eureka's White population has declined by an estimated 3.7%. White residents' share of Eureka's population has increased from 91.6% to 92.1%.

Eureka is more White than neighboring Congerville (83.1% White). Eureka is less White than neighboring Goodfield (94.3% White), Deer Creek (98.3% White), Roanoke (93.1% White), and Metamora (92.4% White).

Eureka's Black Population

89 residents of Eureka, or 1.8% of the population, identify as Black. The share of Black residents in Eureka is considerably lower than in Illinois overall, where 13.3% of the population is Black. Eureka ranks 411th statewide in terms of Black residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Eureka's Black population has grown by an estimated 2.3%. Black residents' share of Eureka's population has remained roughly unchanged at 1.8%.

Eureka is more Black than neighboring Goodfield (0% Black), Deer Creek (0% Black), Roanoke (0% Black), Metamora (0% Black), and Congerville (0% Black).

Eureka's Asian Population

12 residents of Eureka, or 0.2% of the population, identify as Asian. The share of Asian residents in Eureka is lower than in Illinois overall, where 5.9% of the population is Asian. Eureka ranks 556th statewide in terms of Asian residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Eureka's Asian population has declined by an estimated 62.5%. Asian residents' share of Eureka's population has remained roughly unchanged at 0.2%.

Eureka is more Asian than neighboring Roanoke (0% Asian). Eureka is less Asian than neighboring Goodfield (0.7% Asian), Metamora (2.3% Asian), and Congerville (0.4% Asian).

Eureka's Hispanic Population

138 residents of Eureka, or 2.8% of the population, identify as Hispanic. The share of Hispanic residents in Eureka is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Eureka ranks 897th statewide in terms of Hispanic residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Eureka's Hispanic population has grown by an estimated 17.9%. Hispanic residents' share of Eureka's population has increased from 2.2% to 2.8%.

Eureka is more Hispanic than neighboring Goodfield (2.4% Hispanic), Deer Creek (1.2% Hispanic), Metamora (2.4% Hispanic), and Congerville (0.1% Hispanic). Eureka is less Hispanic than neighboring Roanoke (6.2% Hispanic).

Eureka's Native American/Other Population

40 residents of Eureka, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Eureka is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Eureka ranks 871st statewide in terms of Native American/Other residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Eureka's Native American/Other population has grown by an estimated 150.0%. Native American/Other residents' share of Eureka's population has increased from 0.3% to 0.8%.

Eureka is more Native American/Other than neighboring Goodfield (0% Native American/Other), Deer Creek (0% Native American/Other), Roanoke (0% Native American/Other), and Metamora (0% Native American/Other). Eureka is less Native American/Other than neighboring Congerville (1.5% Native American/Other).

Eureka's Multiracial Population

119 residents of Eureka, or 2.4% of the population, identify as Multiracial. The share of Multiracial residents in Eureka is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Eureka ranks 680th statewide in terms of Multiracial residents as a share of the population, out of 1,461 places.

Since the 2020 Census, Eureka's Multiracial population has declined by an estimated 36.4%. Multiracial residents' share of Eureka's population has decreased from 3.6% to 2.4%.

Eureka is more Multiracial than neighboring Deer Creek (0.3% Multiracial), and Roanoke (0.7% Multiracial). Eureka is less Multiracial than neighboring Goodfield (2.5% Multiracial), Metamora (2.9% Multiracial), and Congerville (14.9% 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.