Henry County Demographics

A map of Henry County's Population by Race

Henry County, Illinois has an estimated population of 48,643, a slight decrease from the 49,284 recorded in the 2020 Census. The population is 87.0% White, 6.9% Hispanic, 4.0% Multiracial, 1.0% Black, 0.6% Native American/Other, and 0.5% Asian. This demographic dot map shows the population of Henry County, with one dot drawn for each person counted by the Census, color-coded by race.

Henry has become slightly more 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 Henry County, that probability was 23.0% in 2020 and 23.7% in the most recent ACS estimates.

Henry County is ranked the 30th most populous county in Illinois, out of 102 counties. Henry County was ranked the 30th most populous county in the 2020 Census.

Henry County's White Population

42,305 residents of Henry County, or 87.0% of the population, identify as White. The share of White residents in Henry County is significantly higher than in Illinois overall, where 58.1% of the population is White. Henry County ranks 55th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Henry County's White population has declined by an estimated 1.8%. White residents' share of Henry County's population has remained roughly unchanged at 87.0%.

Henry County is more White than neighboring Knox County (79.9% White), Rock Island County (67.4% White), Whiteside County (80.9% White), and Scott County (77% White). Henry County is less White than neighboring Stark County (90.7% White).

Henry County's Black Population

480 residents of Henry County, or 1.0% of the population, identify as Black. The share of Black residents in Henry County is considerably lower than in Illinois overall, where 13.3% of the population is Black. Henry County ranks 53rd statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Henry County's Black population has declined by an estimated 53.4%. Black residents' share of Henry County's population has decreased from 2.1% to 1.0%.

Henry County is less Black than neighboring Stark County (1.2% Black), Knox County (8% Black), Rock Island County (10.9% Black), Whiteside County (1.2% Black), and Scott County (7.1% Black).

Henry County's Asian Population

254 residents of Henry County, or 0.5% of the population, identify as Asian. The share of Asian residents in Henry County is lower than in Illinois overall, where 5.9% of the population is Asian. Henry County ranks 68th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Henry County's Asian population has grown by an estimated 32.3%. Asian residents' share of Henry County's population has remained roughly unchanged at 0.5%.

Henry County is less Asian than neighboring Stark County (0.8% Asian), Knox County (1.3% Asian), Rock Island County (2.6% Asian), and Scott County (2.8% Asian).

Henry County's Hispanic Population

3,366 residents of Henry County, or 6.9% of the population, identify as Hispanic. The share of Hispanic residents in Henry County is considerably lower than in Illinois overall, where 18.8% of the population is Hispanic. Henry County ranks 24th statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Henry County's Hispanic population has grown by an estimated 6.2%. Hispanic residents' share of Henry County's population has increased from 6.4% to 6.9%.

Henry County is more Hispanic than neighboring Stark County (2.9% Hispanic), and Knox County (6.4% Hispanic). Henry County is less Hispanic than neighboring Rock Island County (14.2% Hispanic), Whiteside County (13.3% Hispanic), and Scott County (7.4% Hispanic).

Henry County's Native American/Other Population

299 residents of Henry County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Henry County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Henry County ranks 77th statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Henry County's Native American/Other population has grown by an estimated 76.9%. Native American/Other residents' share of Henry County's population has remained roughly unchanged at 0.6%.

Henry County is more Native American/Other than neighboring Stark County (0.1% Native American/Other), Knox County (0.4% Native American/Other), Rock Island County (0.5% Native American/Other), and Whiteside County (0.5% Native American/Other).

Henry County's Multiracial Population

1,939 residents of Henry County, or 4.0% of the population, identify as Multiracial. The share of Multiracial residents in Henry County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Henry County ranks 52nd statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Henry County's Multiracial population has grown by an estimated 19.0%. Multiracial residents' share of Henry County's population has increased from 3.3% to 4.0%.

Henry County is more Multiracial than neighboring Whiteside County (3.6% Multiracial). Henry County is less Multiracial than neighboring Stark County (4.2% Multiracial), Rock Island County (4.4% Multiracial), and Scott County (5.1% 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.