Clarke County Demographics

A map of Clarke County's Population by Race

Clarke County, Iowa has an estimated population of 9,662, a less than 1% change from the 9,748 recorded in the 2020 Census. The population is 77.5% White, 16.8% Hispanic, 4.9% Multiracial, 0.6% Asian, 0.2% Native American/Other, and 0.1% Black. This demographic dot map shows the population of Clarke County, with one dot drawn for each person counted by the Census, color-coded by race.

Clarke has become more racially diverse since the 2020 Census. It is considerably more 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 Clarke County, that probability was 32.8% in 2020 and 36.9% in the most recent ACS estimates.

Clarke County is ranked the 77th most populous county in Iowa, out of 99 counties. Clarke County was ranked the 77th most populous county in the 2020 Census.

Clarke County's White Population

7,488 residents of Clarke County, or 77.5% of the population, identify as White. The share of White residents in Clarke County is slightly lower than in Iowa overall, where 82.3% of the population is White. Clarke County ranks 85th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clarke County's White population has declined by an estimated 4.5%. White residents' share of Clarke County's population has decreased from 80.4% to 77.5%.

Clarke County is less White than neighboring Decatur County (90.2% White), Warren County (91.9% White), Madison County (94.3% White), Union County (91.9% White), and Lucas County (94% White).

Clarke County's Black Population

5 residents of Clarke County, or 0.1% of the population, identify as Black. The share of Black residents in Clarke County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Clarke County ranks 71st statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clarke County's Black population has declined by an estimated 88.4%. Black residents' share of Clarke County's population has remained roughly unchanged at 0.1%.

Clarke County is less Black than neighboring Decatur County (1.3% Black), Warren County (0.7% Black), Madison County (0.7% Black), Union County (0.8% Black), and Lucas County (0.3% Black).

Clarke County's Asian Population

54 residents of Clarke County, or 0.6% of the population, identify as Asian. The share of Asian residents in Clarke County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Clarke County ranks 27th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clarke County's Asian population has declined by an estimated 33.3%. Asian residents' share of Clarke County's population has remained roughly unchanged at 0.6%.

Clarke County is more Asian than neighboring Madison County (0.4% Asian). Clarke County is less Asian than neighboring Decatur County (0.7% Asian), Warren County (0.7% Asian), Union County (0.9% Asian), and Lucas County (0.8% Asian).

Clarke County's Hispanic Population

1,624 residents of Clarke County, or 16.8% of the population, identify as Hispanic. The share of Hispanic residents in Clarke County is higher than in Iowa overall, where 7.3% of the population is Hispanic. Clarke County ranks 9th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clarke County's Hispanic population has grown by an estimated 5.9%. Hispanic residents' share of Clarke County's population has increased from 15.7% to 16.8%.

Clarke County is more Hispanic than neighboring Decatur County (3.5% Hispanic), Warren County (3.7% Hispanic), Madison County (2.3% Hispanic), Union County (3.8% Hispanic), and Lucas County (2.9% Hispanic).

Clarke County's Native American/Other Population

20 residents of Clarke 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 Clarke County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Clarke County ranks 18th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clarke County's Native American/Other population has declined by an estimated 73.3%. Native American/Other residents' share of Clarke County's population has decreased from 0.8% to 0.2%.

Clarke County is more Native American/Other than neighboring Madison County (0.1% Native American/Other), and Lucas County (0% Native American/Other). Clarke County is less Native American/Other than neighboring Decatur County (0.8% Native American/Other).

Clarke County's Multiracial Population

471 residents of Clarke County, or 4.9% of the population, identify as Multiracial. The share of Multiracial residents in Clarke County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Clarke County ranks 93rd statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Clarke County's Multiracial population has grown by an estimated 164.6%. Multiracial residents' share of Clarke County's population has increased from 1.8% to 4.9%.

Clarke County is more Multiracial than neighboring Decatur County (3.4% Multiracial), Warren County (2.8% Multiracial), Madison County (2.2% Multiracial), Union County (2.4% Multiracial), and Lucas County (2% 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.