Randolph County Demographics

A map of Randolph County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	25,594	25,460	85.1%	84.4%
Black	2,459	2,381	8.2%	7.9%
Hispanic	1,147	1,031	3.8%	3.4%
Multiracial	579	1,078	1.9%	3.6%
Asian	169	86	0.6%	0.3%
Native American/Other	110	127	0.4%	0.4%

Randolph County, Illinois has an estimated population of 30,058, a less than 1% change from the 30,163 recorded in the 2020 Census. The population is 85.1% White, 8.2% Black, 3.8% Hispanic, 1.9% Multiracial, 0.6% Asian, and 0.4% Native American/Other. This demographic dot map shows the population of Randolph County, with one dot drawn for each person counted by the Census, color-coded by race.

Randolph 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 Randolph County, that probability was 27.9% in 2020 and 26.6% in the most recent ACS estimates.

Randolph County is ranked the 47th most populous county in Illinois, out of 102 counties. Randolph County was ranked the 47th most populous county in the 2020 Census.

Randolph County's White Population

25,594 residents of Randolph County, or 85.1% of the population, identify as White. The share of White residents in Randolph County is significantly higher than in Illinois overall, where 58.1% of the population is White. Randolph County ranks 66th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Randolph County's White population has remained roughly the same. White residents' share of Randolph County's population has increased from 84.4% to 85.1%.

Randolph County is more White than neighboring St. Clair County (59.1% White), and Perry County (84.9% White). Randolph County is less White than neighboring Perry County (93.4% White), Ste. Genevieve County (93.8% White), and Monroe County (95% White).

Randolph County's Black Population

2,459 residents of Randolph County, or 8.2% of the population, identify as Black. The share of Black residents in Randolph County is lower than in Illinois overall, where 13.3% of the population is Black. Randolph County ranks 23rd statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Randolph County's Black population has grown by an estimated 3.3%. Black residents' share of Randolph County's population has remained roughly unchanged at 8.2%.

Randolph County is more Black than neighboring Perry County (0.7% Black), Ste. Genevieve County (1.2% Black), Monroe County (0.6% Black), and Perry County (7.6% Black). Randolph County is less Black than neighboring St. Clair County (27.7% Black).

Randolph County's Asian Population

169 residents of Randolph County, or 0.6% of the population, identify as Asian. The share of Asian residents in Randolph County is lower than in Illinois overall, where 5.9% of the population is Asian. Randolph County ranks 86th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Randolph County's Asian population has grown by an estimated 96.5%. Asian residents' share of Randolph County's population has remained roughly unchanged at 0.6%.

Randolph County is more Asian than neighboring Ste. Genevieve County (0% Asian), and Perry County (0.4% Asian). Randolph County is less Asian than neighboring Perry County (0.8% Asian), and St. Clair County (1.6% Asian).

Randolph County's Hispanic Population

1,147 residents of Randolph County, or 3.8% of the population, identify as Hispanic. The share of Hispanic residents in Randolph County is considerably lower than in Illinois overall, where 18.8% of the population is Hispanic. Randolph County ranks 46th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Randolph County's Hispanic population has grown by an estimated 11.3%. Hispanic residents' share of Randolph County's population has remained roughly unchanged at 3.8%.

Randolph County is more Hispanic than neighboring Perry County (2.5% Hispanic), Ste. Genevieve County (1.5% Hispanic), Monroe County (1.9% Hispanic), and Perry County (3.7% Hispanic). Randolph County is less Hispanic than neighboring St. Clair County (5.1% Hispanic).

Randolph County's Native American/Other Population

110 residents of Randolph County, or 0.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Randolph County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Randolph County ranks 46th statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Randolph County's Native American/Other population has declined by an estimated 13.4%. Native American/Other residents' share of Randolph County's population has remained roughly unchanged at 0.4%.

Randolph County is more Native American/Other than neighboring Perry County (0% Native American/Other), Ste. Genevieve County (0.1% Native American/Other), Monroe County (0.2% Native American/Other), and Perry County (0.2% Native American/Other). Randolph County is less Native American/Other than neighboring St. Clair County (0.7% Native American/Other).

Randolph County's Multiracial Population

579 residents of Randolph County, or 1.9% of the population, identify as Multiracial. The share of Multiracial residents in Randolph County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Randolph County ranks 40th statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Randolph County's Multiracial population has declined by an estimated 46.3%. Multiracial residents' share of Randolph County's population has decreased from 3.6% to 1.9%.

Randolph County is more Multiracial than neighboring Monroe County (1.6% Multiracial). Randolph County is less Multiracial than neighboring Perry County (2.6% Multiracial), Ste. Genevieve County (3.3% Multiracial), St. Clair County (5.8% Multiracial), and Perry County (3.2% 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.