Mercer County Demographics

A map of Mercer County's Population by Race

Mercer County, Illinois had a population of 15,699 in 2020. It was 92.9% White, 0.4% Black, 0.2% Asian, 3.0% Hispanic, 0.3% Native American/Other, and 3.2% Multiracial. This map presents the population of Mercer County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Mercer County is the 69th most populous county of the 102 counties in Illinois.

Mercer County's White Population

14,578 residents of Mercer County identify as White, or 92.9%. This makes the White share of the population of Mercer County considerably larger than the White share of the population of Illinois (58.3% White). Of the 102 counties in Illinois, Mercer County is ranked #31 in terms of White residents as a share of the population.

Mercer County is more White than neighboring Rock Island County (67.5% White), Warren County (80.2% White), Scott County (77% White), and Muscatine County (75.5% White). Mercer County is less White than neighboring Henderson County (94.9% White).

Mercer County's Black Population

68 residents of Mercer County identify as Black, or 0.4%. This makes the Black share of the population of Mercer County less than the Black share of the population of Illinois (13.9% Black). Of the 102 counties in Illinois, Mercer County is ranked #85 in terms of Black residents as a share of the population.

Mercer County is less Black than neighboring Rock Island County (11.2% Black), Warren County (3.4% Black), Henderson County (0.5% Black), Scott County (7.8% Black), and Muscatine County (2.5% Black).

Mercer County's Asian Population

37 residents of Mercer County identify as Asian, or 0.2%. This makes the Asian share of the population of Mercer County slightly less than the Asian share of the population of Illinois (5.8% Asian). Of the 102 counties in Illinois, Mercer County is ranked #90 in terms of Asian residents as a share of the population.

Mercer County is less Asian than neighboring Rock Island County (2.8% Asian), Warren County (2% Asian), Scott County (2.8% Asian), and Muscatine County (0.9% Asian).

Mercer County's Hispanic Population

468 residents of Mercer County identify as Hispanic, or 3.0%. This makes the Hispanic share of the population of Mercer County less than the Hispanic share of the population of Illinois (18.2% Hispanic). Of the 102 counties in Illinois, Mercer County is ranked #52 in terms of Hispanic residents as a share of the population.

Mercer County is more Hispanic than neighboring Henderson County (1.8% Hispanic). Mercer County is less Hispanic than neighboring Rock Island County (13.7% Hispanic), Warren County (10.6% Hispanic), Scott County (6.9% Hispanic), and Muscatine County (18% Hispanic).

Mercer County's Native American/Other Population

45 residents of Mercer County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.3%. This makes the Native American/Other share of the population of Mercer 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, Mercer County is ranked #89 in terms of Native American/Other residents as a share of the population.

Mercer County is more Native American/Other than neighboring Henderson County (0.2% Native American/Other). Mercer County is less Native American/Other than neighboring Rock Island County (0.5% Native American/Other), Warren County (0.5% Native American/Other), Scott County (0.5% Native American/Other), and Muscatine County (0.4% Native American/Other).

Mercer County's Multiracial Population

503 residents of Mercer County identify as Multiracial, or 3.2%. This makes the Multiracial share of the population of Mercer County roughly similar to the Multiracial share of the population of Illinois (3.2% Multiracial). Of the 102 counties in Illinois, Mercer County is ranked #61 in terms of Multiracial residents as a share of the population.

Mercer County is more Multiracial than neighboring Henderson County (2.5% Multiracial), and Muscatine County (2.7% Multiracial). Mercer County is less Multiracial than neighboring Rock Island County (4.3% Multiracial), Warren County (3.3% Multiracial), and Scott County (4.9% Multiracial).

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