Marion County Demographics

A map of Marion County's Population by Race

Marion County, Illinois had a population of 37,729 in 2020. It was 87.9% White, 4.0% Black, 0.9% Asian, 1.9% Hispanic, 0.5% Native American/Other, and 4.8% Multiracial. This map presents the population of Marion County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Marion County is the 36th most populous county of the 102 counties in Illinois.

Marion County's White Population

33,150 residents of Marion County identify as White, or 87.9%. This makes the White share of the population of Marion County considerably larger than the White share of the population of Illinois (58.3% White). Of the 102 counties in Illinois, Marion County is ranked #53 in terms of White residents as a share of the population.

Marion County is more White than neighboring Jefferson County (84% White). Marion County is less White than neighboring Fayette County (90.4% White), Clay County (93.9% White), Clinton County (89% White), and Effingham County (93.3% White).

Marion County's Black Population

1,509 residents of Marion County identify as Black, or 4.0%. This makes the Black share of the population of Marion County slightly less than the Black share of the population of Illinois (13.9% Black). Of the 102 counties in Illinois, Marion County is ranked #41 in terms of Black residents as a share of the population.

Marion County is more Black than neighboring Fayette County (3.6% Black), Clay County (0.2% Black), Clinton County (3.1% Black), and Effingham County (0.4% Black). Marion County is less Black than neighboring Jefferson County (7.5% Black).

Marion County's Asian Population

349 residents of Marion County identify as Asian, or 0.9%. This makes the Asian share of the population of Marion County roughly similar to the Asian share of the population of Illinois (5.8% Asian). Of the 102 counties in Illinois, Marion County is ranked #27 in terms of Asian residents as a share of the population.

Marion County is more Asian than neighboring Fayette County (0.3% Asian), Clay County (0.6% Asian), Clinton County (0.5% Asian), and Effingham County (0.7% Asian).

Marion County's Hispanic Population

712 residents of Marion County identify as Hispanic, or 1.9%. This makes the Hispanic share of the population of Marion County less than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 102 counties in Illinois, Marion County is ranked #71 in terms of Hispanic residents as a share of the population.

Marion County is more Hispanic than neighboring Clay County (1.7% Hispanic). Marion County is less Hispanic than neighboring Jefferson County (2.4% Hispanic), Fayette County (3.1% Hispanic), Clinton County (3.8% Hispanic), and Effingham County (2.5% Hispanic).

Marion County's Native American/Other Population

192 residents of Marion 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 Marion 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, Marion County is ranked #30 in terms of Native American/Other residents as a share of the population.

Marion County is more Native American/Other than neighboring Jefferson County (0.4% Native American/Other), Clay County (0.4% Native American/Other), and Effingham County (0.3% Native American/Other).

Marion County's Multiracial Population

1,817 residents of Marion County identify as Multiracial, or 4.8%. This makes the Multiracial share of the population of Marion County roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 102 counties in Illinois, Marion County is ranked #7 in terms of Multiracial residents as a share of the population.

Marion County is more Multiracial than neighboring Jefferson County (4.7% Multiracial), Fayette County (2.1% Multiracial), Clay County (3.2% Multiracial), Clinton County (3.2% Multiracial), and Effingham County (2.7% Multiracial).

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