Greene County Demographics

A map of Greene County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	11,196	11,451	95.8%	95.5%
Multiracial	183	350	1.6%	2.9%
Hispanic	128	106	1.1%	0.9%
Black	88	18	0.8%	0.2%
Asian	61	21	0.5%	0.2%
Native American/Other	27	39	0.2%	0.3%

Greene County, Illinois has an estimated population of 11,683, a slight decrease from the 11,985 recorded in the 2020 Census. The population is 95.8% White, 1.6% Multiracial, 1.1% Hispanic, 0.8% Black, 0.5% Asian, and 0.2% Native American/Other. This demographic dot map shows the population of Greene County, with one dot drawn for each person counted by the Census, color-coded by race.

Greene has become slightly 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 Greene County, that probability was 8.6% in 2020 and 8.1% in the most recent ACS estimates.

Greene County is ranked the 84th most populous county in Illinois, out of 102 counties. Greene County was ranked the 84th most populous county in the 2020 Census.

Greene County's White Population

11,196 residents of Greene County, or 95.8% of the population, identify as White. The share of White residents in Greene County is significantly higher than in Illinois overall, where 58.1% of the population is White. Greene County ranks 5th statewide in terms of White residents as a share of the population, out of 102 counties.

Since the 2020 Census, Greene County's White population has declined by an estimated 2.2%. White residents' share of Greene County's population has remained roughly unchanged at 95.8%.

Greene County is more White than neighboring Jersey County (94.6% White), Scott County (95.4% White), Calhoun County (94.3% White), Morgan County (87.2% White), and Macoupin County (93.5% White).

Greene County's Black Population

88 residents of Greene County, or 0.8% of the population, identify as Black. The share of Black residents in Greene County is considerably lower than in Illinois overall, where 13.3% of the population is Black. Greene County ranks 101st statewide in terms of Black residents as a share of the population, out of 102 counties.

Since the 2020 Census, Greene County's Black population has grown by an estimated 388.9%. Black residents' share of Greene County's population has increased from 0.2% to 0.8%.

Greene County is more Black than neighboring Jersey County (0.6% Black). Greene County is less Black than neighboring Scott County (1% Black), Calhoun County (1.5% Black), Morgan County (4.9% Black), and Macoupin County (1.5% Black).

Greene County's Asian Population

61 residents of Greene County, or 0.5% of the population, identify as Asian. The share of Asian residents in Greene County is lower than in Illinois overall, where 5.9% of the population is Asian. Greene County ranks 97th statewide in terms of Asian residents as a share of the population, out of 102 counties.

Since the 2020 Census, Greene County's Asian population has grown by an estimated 190.5%. Asian residents' share of Greene County's population has remained roughly unchanged at 0.5%.

Greene County is more Asian than neighboring Scott County (0.4% Asian), Calhoun County (0% Asian), and Macoupin County (0.3% Asian). Greene County is less Asian than neighboring Jersey County (0.7% Asian), and Morgan County (0.8% Asian).

Greene County's Hispanic Population

128 residents of Greene County, or 1.1% of the population, identify as Hispanic. The share of Hispanic residents in Greene County is significantly lower than in Illinois overall, where 18.8% of the population is Hispanic. Greene County ranks 102nd statewide in terms of Hispanic residents as a share of the population, out of 102 counties.

Since the 2020 Census, Greene County's Hispanic population has grown by an estimated 20.8%. Hispanic residents' share of Greene County's population has remained roughly unchanged at 1.1%.

Greene County is more Hispanic than neighboring Calhoun County (0.8% Hispanic). Greene County is less Hispanic than neighboring Jersey County (1.6% Hispanic), Scott County (1.6% Hispanic), Morgan County (2.9% Hispanic), and Macoupin County (1.4% Hispanic).

Greene County's Native American/Other Population

27 residents of Greene 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 Greene County is comparable to the share in Illinois overall, where 0.5% of the population is Native American/Other. Greene County ranks 82nd statewide in terms of Native American/Other residents as a share of the population, out of 102 counties.

Since the 2020 Census, Greene County's Native American/Other population has declined by an estimated 30.8%. Native American/Other residents' share of Greene County's population has remained roughly unchanged at 0.2%.

Greene County is more Native American/Other than neighboring Scott County (0.1% Native American/Other), and Calhoun County (0.1% Native American/Other). Greene County is less Native American/Other than neighboring Macoupin County (0.3% Native American/Other).

Greene County's Multiracial Population

183 residents of Greene County, or 1.6% of the population, identify as Multiracial. The share of Multiracial residents in Greene County is comparable to the share in Illinois overall, where 3.4% of the population is Multiracial. Greene County ranks 73rd statewide in terms of Multiracial residents as a share of the population, out of 102 counties.

Since the 2020 Census, Greene County's Multiracial population has declined by an estimated 47.7%. Multiracial residents' share of Greene County's population has decreased from 2.9% to 1.6%.

Greene County is more Multiracial than neighboring Scott County (1.4% Multiracial). Greene County is less Multiracial than neighboring Jersey County (2.4% Multiracial), Calhoun County (3.2% Multiracial), Morgan County (4% Multiracial), and Macoupin County (3% 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.