Warren County Demographics

A map of Warren County's Population by Race

Warren County, Illinois had a population of 16,835 in 2020. It was 80.2% White, 3.4% Black, 2.0% Asian, 10.6% Hispanic, 0.5% Native American/Other, and 3.3% Multiracial. This map presents the population of Warren County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Warren County is the 63rd most populous county of the 102 counties in Illinois.

Warren County's White Population

13,494 residents of Warren County identify as White, or 80.2%. This makes the White share of the population of Warren County considerably larger than the White share of the population of Illinois (58.3% White). Of the 102 counties in Illinois, Warren County is ranked #76 in terms of White residents as a share of the population.

Warren County is more White than neighboring Knox County (79.3% White). Warren County is less White than neighboring Henderson County (94.9% White), Mercer County (92.9% White), McDonough County (84.7% White), and Fulton County (91.1% White).

Warren County's Black Population

577 residents of Warren County identify as Black, or 3.4%. This makes the Black share of the population of Warren County slightly less than the Black share of the population of Illinois (13.9% Black). Of the 102 counties in Illinois, Warren County is ranked #44 in terms of Black residents as a share of the population.

Warren County is more Black than neighboring Henderson County (0.5% Black), Mercer County (0.4% Black), and Fulton County (3.3% Black). Warren County is less Black than neighboring McDonough County (5.5% Black), and Knox County (8.7% Black).

Warren County's Asian Population

329 residents of Warren County identify as Asian, or 2.0%. This makes the Asian share of the population of Warren County roughly similar to the Asian share of the population of Illinois (5.8% Asian). Of the 102 counties in Illinois, Warren County is ranked #18 in terms of Asian residents as a share of the population.

Warren County is more Asian than neighboring Henderson County (0.2% Asian), Mercer County (0.2% Asian), Knox County (0.7% Asian), and Fulton County (0.2% Asian). Warren County is less Asian than neighboring McDonough County (2.1% Asian).

Warren County's Hispanic Population

1,789 residents of Warren County identify as Hispanic, or 10.6%. This makes the Hispanic share of the population of Warren County slightly less than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 102 counties in Illinois, Warren County is ranked #17 in terms of Hispanic residents as a share of the population.

Warren County is more Hispanic than neighboring Henderson County (1.8% Hispanic), Mercer County (3% Hispanic), McDonough County (3.5% Hispanic), Knox County (6.1% Hispanic), and Fulton County (2.2% Hispanic).

Warren County's Native American/Other Population

92 residents of Warren County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. This makes the Native American/Other share of the population of Warren County roughly similar to the Native American/Other share of the population of Illinois (0.5% Native American/Other). Of the 102 counties in Illinois, Warren County is ranked #22 in terms of Native American/Other residents as a share of the population.

Warren County is more Native American/Other than neighboring Henderson County (0.2% Native American/Other), Mercer County (0.3% Native American/Other), and Fulton County (0.4% Native American/Other). Warren County is less Native American/Other than neighboring Knox County (0.6% Native American/Other).

Warren County's Multiracial Population

554 residents of Warren County identify as Multiracial, or 3.3%. This makes the Multiracial share of the population of Warren County roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 102 counties in Illinois, Warren County is ranked #53 in terms of Multiracial residents as a share of the population.

Warren County is more Multiracial than neighboring Henderson County (2.5% Multiracial), Mercer County (3.2% Multiracial), and Fulton County (2.8% Multiracial). Warren County is less Multiracial than neighboring McDonough County (3.8% Multiracial), and Knox County (4.6% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.