Greene County Demographics

A map of Greene County's Population by Race

Greene County, Iowa has an estimated population of 8,688, a less than 1% change from the 8,771 recorded in the 2020 Census. The population is 92.3% White, 3.5% Hispanic, 3.1% Multiracial, 0.6% Asian, 0.3% Native American/Other, and 0.1% Black. 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 more racially diverse since the 2020 Census. It is considerably less diverse than Iowa 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 12.7% in 2020 and 14.6% in the most recent ACS estimates.

Greene County is ranked the 84th most populous county in Iowa, out of 99 counties. Greene County was ranked the 83rd most populous county in the 2020 Census.

Greene County's White Population

8,019 residents of Greene County, or 92.3% of the population, identify as White. The share of White residents in Greene County is higher than in Iowa overall, where 82.3% of the population is White. Greene County ranks 31st statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Greene County's White population has declined by an estimated 2.1%. White residents' share of Greene County's population has decreased from 93.4% to 92.3%.

Greene County is more White than neighboring Calhoun County (91.3% White), Webster County (83.9% White), and Carroll County (91.9% White). Greene County is less White than neighboring Guthrie County (92.4% White), and Boone County (92.9% White).

Greene County's Black Population

10 residents of Greene County, or 0.1% of the population, identify as Black. The share of Black residents in Greene County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Greene County ranks 87th statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Greene County's Black population has declined by an estimated 54.5%. Black residents' share of Greene County's population has remained roughly unchanged at 0.1%.

Greene County is less Black than neighboring Guthrie County (0.6% Black), Calhoun County (1.6% Black), Webster County (3.3% Black), Carroll County (0.5% Black), and Boone County (1.2% Black).

Greene County's Asian Population

55 residents of Greene County, or 0.6% of the population, identify as Asian. The share of Asian residents in Greene County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Greene County ranks 38th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Greene County's Asian population has grown by an estimated 14.6%. Asian residents' share of Greene County's population has remained roughly unchanged at 0.6%.

Greene County is more Asian than neighboring Guthrie County (0.5% Asian), Calhoun County (0.2% Asian), Carroll County (0.2% Asian), and Boone County (0.2% Asian). Greene County is less Asian than neighboring Webster County (1.2% Asian).

Greene County's Hispanic Population

307 residents of Greene County, or 3.5% of the population, identify as Hispanic. The share of Hispanic residents in Greene County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Greene County ranks 58th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Greene County's Hispanic population has grown by an estimated 19.9%. Hispanic residents' share of Greene County's population has increased from 2.9% to 3.5%.

Greene County is more Hispanic than neighboring Guthrie County (3.1% Hispanic), Calhoun County (2.7% Hispanic), and Boone County (2.9% Hispanic). Greene County is less Hispanic than neighboring Webster County (6.6% Hispanic).

Greene County's Native American/Other Population

27 residents of Greene County, or 0.3% 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 Iowa overall, where 0.6% of the population is Native American/Other. Greene County ranks 73rd statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Greene County's Native American/Other population has declined by an estimated 3.6%. Native American/Other residents' share of Greene County's population has remained roughly unchanged at 0.3%.

Greene County is more Native American/Other than neighboring Boone County (0% Native American/Other). Greene County is less Native American/Other than neighboring Guthrie County (0.9% Native American/Other), Calhoun County (0.6% Native American/Other), and Webster County (0.4% Native American/Other).

Greene County's Multiracial Population

270 residents of Greene County, or 3.1% of the population, identify as Multiracial. The share of Multiracial residents in Greene County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Greene County ranks 43rd statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Greene County's Multiracial population has grown by an estimated 17.9%. Multiracial residents' share of Greene County's population has increased from 2.6% to 3.1%.

Greene County is more Multiracial than neighboring Guthrie County (2.5% Multiracial), and Boone County (2.8% Multiracial). Greene County is less Multiracial than neighboring Calhoun County (3.6% Multiracial), Webster County (4.7% Multiracial), and Carroll County (3.6% 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.