Iowa County Demographics

A map of Iowa County's Population by Race

Iowa County, Iowa has an estimated population of 16,507, a less than 1% change from the 16,662 recorded in the 2020 Census. The population is 92.5% White, 3.4% Hispanic, 2.7% Multiracial, 0.8% Native American/Other, 0.3% Black, and 0.2% Asian. This demographic dot map shows the population of Iowa County, with one dot drawn for each person counted by the Census, color-coded by race.

Iowa is about as racially diverse as it was in 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 Iowa County, that probability was 14.5% in 2020 and 14.2% in the most recent ACS estimates.

Iowa County is ranked the 45th most populous county in Iowa, out of 99 counties. Iowa County was ranked the 44th most populous county in the 2020 Census.

Iowa County's White Population

15,270 residents of Iowa County, or 92.5% of the population, identify as White. The share of White residents in Iowa County is considerably higher than in Iowa overall, where 82.3% of the population is White. Iowa County ranks 46th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Iowa County's White population has remained roughly the same. White residents' share of Iowa County's population has remained roughly unchanged at 92.5%.

Iowa County is more White than neighboring Poweshiek County (89.8% White), Johnson County (74.8% White), and Washington County (88.7% White). Iowa County is less White than neighboring Keokuk County (94.6% White), and Benton County (94.4% White).

Iowa County's Black Population

54 residents of Iowa County, or 0.3% of the population, identify as Black. The share of Black residents in Iowa County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Iowa County ranks 54th statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Iowa County's Black population has declined by an estimated 51.4%. Black residents' share of Iowa County's population has remained roughly unchanged at 0.3%.

Iowa County is less Black than neighboring Benton County (0.4% Black), Poweshiek County (0.9% Black), Johnson County (7.6% Black), and Washington County (1% Black).

Iowa County's Asian Population

40 residents of Iowa County, or 0.2% of the population, identify as Asian. The share of Asian residents in Iowa County is slightly lower than in Iowa overall, where 2.5% of the population is Asian. Iowa County ranks 44th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Iowa County's Asian population has declined by an estimated 52.4%. Asian residents' share of Iowa County's population has remained roughly unchanged at 0.2%.

Iowa County is less Asian than neighboring Poweshiek County (2% Asian), Johnson County (5.6% Asian), and Washington County (0.4% Asian).

Iowa County's Hispanic Population

564 residents of Iowa County, or 3.4% of the population, identify as Hispanic. The share of Hispanic residents in Iowa County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Iowa County ranks 57th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Iowa County's Hispanic population has grown by an estimated 13.9%. Hispanic residents' share of Iowa County's population has remained roughly unchanged at 3.4%.

Iowa County is more Hispanic than neighboring Keokuk County (2.3% Hispanic), and Benton County (2% Hispanic). Iowa County is less Hispanic than neighboring Poweshiek County (3.5% Hispanic), Johnson County (6.7% Hispanic), and Washington County (7.8% Hispanic).

Iowa County's Native American/Other Population

137 residents of Iowa County, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Iowa County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Iowa County ranks 37th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Iowa County's Native American/Other population has grown by an estimated 57.5%. Native American/Other residents' share of Iowa County's population has remained roughly unchanged at 0.8%.

Iowa County is more Native American/Other than neighboring Keokuk County (0.3% Native American/Other), Benton County (0.2% Native American/Other), Poweshiek County (0.4% Native American/Other), Johnson County (0.6% Native American/Other), and Washington County (0.2% Native American/Other).

Iowa County's Multiracial Population

442 residents of Iowa County, or 2.7% of the population, identify as Multiracial. The share of Multiracial residents in Iowa County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Iowa County ranks 29th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Iowa County's Multiracial population has declined by an estimated 10.0%. Multiracial residents' share of Iowa County's population has remained roughly unchanged at 2.7%.

Iowa County is more Multiracial than neighboring Keokuk County (2.3% Multiracial), and Washington County (2% Multiracial). Iowa County is less Multiracial than neighboring Benton County (2.8% Multiracial), Poweshiek County (3.3% Multiracial), and Johnson County (4.6% 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.