Eureka, KS Demographics

A map of Eureka's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	1,991	2,043	89.6%	87.6%
Hispanic	110	103	4.9%	4.4%
Multiracial	72	133	3.2%	5.7%
Black	29	13	1.3%	0.6%
Native American/Other	21	17	0.9%	0.7%
Asian	0	23	0.0%	1.0%

Eureka, Kansas has an estimated population of 2,223, a decrease from the 2,332 recorded in the 2020 Census. The population is 89.6% White, 4.9% Hispanic, 3.2% Multiracial, 1.3% Black, 0.9% Native American/Other, and 0.0% 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 less racially diverse since the 2020 Census. It is considerably less diverse than Kansas 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 22.7% in 2020 and 19.4% in the most recent ACS estimates.

Eureka is ranked the 113th most populous place in Kansas, out of 740 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 105th most populous place in the 2020 Census.

Eureka's White Population

1,991 residents of Eureka, or 89.6% of the population, identify as White. The share of White residents in Eureka is significantly higher than in Kansas overall, where 72.7% of the population is White. Eureka ranks 400th statewide in terms of White residents as a share of the population, out of 740 places.

Since the 2020 Census, Eureka's White population has declined by an estimated 2.5%. White residents' share of Eureka's population has increased from 87.6% to 89.6%.

Eureka is more White than neighboring Piedmont (37% White). Eureka is less White than neighboring Climax (100% White), Hamilton (96.8% White), Neal (100% White), and Severy (92.6% White).

Eureka's Black Population

29 residents of Eureka, or 1.3% of the population, identify as Black. The share of Black residents in Eureka is slightly lower than in Kansas overall, where 5.2% of the population is Black. Eureka ranks 278th statewide in terms of Black residents as a share of the population, out of 740 places.

Since the 2020 Census, Eureka's Black population has grown by an estimated 123.1%. Black residents' share of Eureka's population has increased from 0.6% to 1.3%.

Eureka is more Black than neighboring Climax (0% Black), Hamilton (0% Black), Neal (0% Black), Severy (0% Black), and Piedmont (0% Black).

Eureka's Asian Population

0 residents of Eureka, or 0.0% of the population, identify as Asian. The share of Asian residents in Eureka is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Eureka ranks 105th statewide in terms of Asian residents as a share of the population, out of 740 places.

Since the 2020 Census, Eureka's Asian population has declined by an estimated 100.0%. Asian residents' share of Eureka's population has decreased from 1.0% to 0.0%.

Eureka's Hispanic Population

110 residents of Eureka, or 4.9% of the population, identify as Hispanic. The share of Hispanic residents in Eureka is lower than in Kansas overall, where 13.6% of the population is Hispanic. Eureka ranks 339th statewide in terms of Hispanic residents as a share of the population, out of 740 places.

Since the 2020 Census, Eureka's Hispanic population has grown by an estimated 6.8%. Hispanic residents' share of Eureka's population has increased from 4.4% to 4.9%.

Eureka is more Hispanic than neighboring Climax (0% Hispanic), Hamilton (0% Hispanic), Neal (0% Hispanic), and Severy (0% Hispanic). Eureka is less Hispanic than neighboring Piedmont (63% Hispanic).

Eureka's Native American/Other Population

21 residents of Eureka, or 0.9% 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 Kansas overall, where 0.9% of the population is Native American/Other. Eureka ranks 364th statewide in terms of Native American/Other residents as a share of the population, out of 740 places.

Since the 2020 Census, Eureka's Native American/Other population has grown by an estimated 23.5%. Native American/Other residents' share of Eureka's population has remained roughly unchanged at 0.9%.

Eureka is more Native American/Other than neighboring Climax (0% Native American/Other), Hamilton (0% Native American/Other), Neal (0% Native American/Other), Severy (0% Native American/Other), and Piedmont (0% Native American/Other).

Eureka's Multiracial Population

72 residents of Eureka, or 3.2% of the population, identify as Multiracial. The share of Multiracial residents in Eureka is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Eureka ranks 231st statewide in terms of Multiracial residents as a share of the population, out of 740 places.

Since the 2020 Census, Eureka's Multiracial population has declined by an estimated 45.9%. Multiracial residents' share of Eureka's population has decreased from 5.7% to 3.2%.

Eureka is more Multiracial than neighboring Climax (0% Multiracial), Neal (0% Multiracial), and Piedmont (0% Multiracial). Eureka is less Multiracial than neighboring Severy (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.