Jersey County Demographics

A map of Jersey County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	20,132	20,105	94.6%	93.5%
Multiracial	503	794	2.4%	3.7%
Hispanic	340	327	1.6%	1.5%
Asian	143	74	0.7%	0.3%
Black	118	156	0.6%	0.7%
Native American/Other	38	56	0.2%	0.3%

Jersey County, Illinois has an estimated population of 21,274, a slight decrease from the 21,512 recorded in the 2020 Census. The population is 94.6% White, 2.4% Multiracial, 1.6% Hispanic, 0.7% Asian, 0.6% Black, and 0.2% Native American/Other. This demographic dot map shows the population of Jersey County, with one dot drawn for each person counted by the Census, color-coded by race.

Jersey 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 Jersey County, that probability was 12.5% in 2020 and 10.4% in the most recent ACS estimates.

Jersey County is ranked the 55th most populous county in Illinois, out of 102 counties. Jersey County was ranked the 54th most populous county in the 2020 Census.

Jersey County's White Population

20,132 residents of Jersey County, or 94.6% of the population, identify as White. The share of White residents in Jersey County is significantly higher than in Illinois overall, where 58.1% of the population is White. Jersey County ranks 26th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Jersey County's White population has remained roughly the same. White residents' share of Jersey County's population has increased from 93.5% to 94.6%.

Jersey County is more White than neighboring Calhoun County (94.3% White), St. Charles County (83% White), St. Louis County (61.4% White), and St. Louis County (44.4% White). Jersey County is less White than neighboring Greene County (95.8% White).

Jersey County's Black Population

118 residents of Jersey County, or 0.6% of the population, identify as Black. The share of Black residents in Jersey County is considerably lower than in Illinois overall, where 13.3% of the population is Black. Jersey County ranks 66th statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Jersey County's Black population has declined by an estimated 24.4%. Black residents' share of Jersey County's population has remained roughly unchanged at 0.6%.

Jersey County is less Black than neighboring Greene County (0.8% Black), Calhoun County (1.5% Black), St. Charles County (5% Black), St. Louis County (24% Black), and St. Louis County (42.1% Black).

Jersey County's Asian Population

143 residents of Jersey County, or 0.7% of the population, identify as Asian. The share of Asian residents in Jersey County is lower than in Illinois overall, where 5.9% of the population is Asian. Jersey County ranks 74th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Jersey County's Asian population has grown by an estimated 93.2%. Asian residents' share of Jersey County's population has remained roughly unchanged at 0.7%.

Jersey County is more Asian than neighboring Greene County (0.5% Asian), and Calhoun County (0% Asian). Jersey County is less Asian than neighboring St. Charles County (3% Asian), St. Louis County (4.9% Asian), and St. Louis County (3.5% Asian).

Jersey County's Hispanic Population

340 residents of Jersey County, or 1.6% of the population, identify as Hispanic. The share of Hispanic residents in Jersey County is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Jersey County ranks 85th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Jersey County's Hispanic population has grown by an estimated 4.0%. Hispanic residents' share of Jersey County's population has remained roughly unchanged at 1.6%.

Jersey County is more Hispanic than neighboring Greene County (1.1% Hispanic), and Calhoun County (0.8% Hispanic). Jersey County is less Hispanic than neighboring St. Charles County (4.2% Hispanic), St. Louis County (3.9% Hispanic), and St. Louis County (5.3% Hispanic).

Jersey County's Native American/Other Population

38 residents of Jersey County, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Jersey County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Jersey County ranks 92nd statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Jersey County's Native American/Other population has declined by an estimated 32.1%. Native American/Other residents' share of Jersey County's population has remained roughly unchanged at 0.2%.

Jersey County is more Native American/Other than neighboring Calhoun County (0.1% Native American/Other). Jersey County is less Native American/Other than neighboring St. Charles County (0.5% Native American/Other), St. Louis County (0.6% Native American/Other), and St. Louis County (0.6% Native American/Other).

Jersey County's Multiracial Population

503 residents of Jersey County, or 2.4% of the population, identify as Multiracial. The share of Multiracial residents in Jersey County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Jersey County ranks 35th statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Jersey County's Multiracial population has declined by an estimated 36.6%. Multiracial residents' share of Jersey County's population has decreased from 3.7% to 2.4%.

Jersey County is more Multiracial than neighboring Greene County (1.6% Multiracial). Jersey County is less Multiracial than neighboring Calhoun County (3.2% Multiracial), St. Charles County (4.3% Multiracial), St. Louis County (5.3% Multiracial), and St. Louis County (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.