Harrison County Demographics

A map of Harrison County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	13,813	13,818	94.4%	94.8%
Multiracial	395	346	2.7%	2.4%
Hispanic	328	293	2.2%	2.0%
Asian	43	49	0.3%	0.3%
Native American/Other	35	49	0.2%	0.3%
Black	18	27	0.1%	0.2%

Harrison County, Iowa has an estimated population of 14,632, a less than 1% change from the 14,582 recorded in the 2020 Census. The population is 94.4% White, 2.7% Multiracial, 2.2% Hispanic, 0.3% Asian, 0.2% Native American/Other, and 0.1% Black. This demographic dot map shows the population of Harrison County, with one dot drawn for each person counted by the Census, color-coded by race.

Harrison has become slightly 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 Harrison County, that probability was 10.1% in 2020 and 10.8% in the most recent ACS estimates.

Harrison County is ranked the 52nd most populous county in Iowa, out of 99 counties. Harrison County was ranked the 53rd most populous county in the 2020 Census.

Harrison County's White Population

13,813 residents of Harrison County, or 94.4% of the population, identify as White. The share of White residents in Harrison County is considerably higher than in Iowa overall, where 82.3% of the population is White. Harrison County ranks 13th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Harrison County's White population has remained roughly the same. White residents' share of Harrison County's population has remained roughly unchanged at 94.4%.

Harrison County is more White than neighboring Monona County (92.8% White), Washington County (92.9% White), Pottawattamie County (84.5% White), Shelby County (91.3% White), and Douglas County (65.8% White).

Harrison County's Black Population

18 residents of Harrison County, or 0.1% of the population, identify as Black. The share of Black residents in Harrison County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Harrison County ranks 93rd statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Harrison County's Black population has declined by an estimated 33.3%. Black residents' share of Harrison County's population has remained roughly unchanged at 0.1%.

Harrison County is less Black than neighboring Monona County (0.2% Black), Washington County (0.3% Black), Pottawattamie County (1.8% Black), Shelby County (0.3% Black), and Douglas County (10.2% Black).

Harrison County's Asian Population

43 residents of Harrison County, or 0.3% of the population, identify as Asian. The share of Asian residents in Harrison County is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Harrison County ranks 67th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Harrison County's Asian population has declined by an estimated 12.2%. Asian residents' share of Harrison County's population has remained roughly unchanged at 0.3%.

Harrison County is more Asian than neighboring Monona County (0% Asian), and Washington County (0.2% Asian). Harrison County is less Asian than neighboring Pottawattamie County (0.9% Asian), Shelby County (0.5% Asian), and Douglas County (4.4% Asian).

Harrison County's Hispanic Population

328 residents of Harrison County, or 2.2% of the population, identify as Hispanic. The share of Hispanic residents in Harrison County is lower than in Iowa overall, where 7.3% of the population is Hispanic. Harrison County ranks 83rd statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Harrison County's Hispanic population has grown by an estimated 11.9%. Hispanic residents' share of Harrison County's population has remained roughly unchanged at 2.2%.

Harrison County is less Hispanic than neighboring Monona County (2.7% Hispanic), Washington County (3.3% Hispanic), Pottawattamie County (9.1% Hispanic), Shelby County (4.4% Hispanic), and Douglas County (14.5% Hispanic).

Harrison County's Native American/Other Population

35 residents of Harrison 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 Harrison County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Harrison County ranks 71st statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Harrison County's Native American/Other population has declined by an estimated 28.6%. Native American/Other residents' share of Harrison County's population has remained roughly unchanged at 0.2%.

Harrison County is less Native American/Other than neighboring Monona County (0.4% Native American/Other), Washington County (0.3% Native American/Other), Pottawattamie County (0.7% Native American/Other), Shelby County (0.5% Native American/Other), and Douglas County (0.6% Native American/Other).

Harrison County's Multiracial Population

395 residents of Harrison County, or 2.7% of the population, identify as Multiracial. The share of Multiracial residents in Harrison County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Harrison County ranks 62nd statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Harrison County's Multiracial population has grown by an estimated 14.2%. Multiracial residents' share of Harrison County's population has remained roughly unchanged at 2.7%.

Harrison County is less Multiracial than neighboring Monona County (3.8% Multiracial), Washington County (3% Multiracial), Pottawattamie County (3% Multiracial), Shelby County (3% Multiracial), and Douglas County (4.5% 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.