Population By Race and Ethnicity in Johnson County, IA in 2020

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2020, the 153,056 population of Johnson County, Iowa comprised of 10,132 people who identified as Hispanic (6.62%), and 142,924 people who identified as Non-Hispanic (93.38%).

Race: The White Alone population was the largest racial group in Johnson County, Iowa with a population of 126,244 (82.48%); Black or African American Alone population was the second largest racial group with a population of 12,287 (8.03%); and Asian Alone was the third largest racial group with a population of 9,873 (6.45%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Johnson County, Iowa in 2020, with a population of 117,281 (76.63%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 11,863 (7.75%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 9,776 (6.39%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Johnson, Iowa.

You can find similar information for other Iowa counties, and for Iowa.

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Hispanics and Non Hispanics in Johnson County, IA in 2020
Total Population:
Race in Johnson County, IA in 2020
Total Population:
Ethnicity in Johnson County, IA in 2020
Total Population:
Population By Race in Johnson , IA in 2020
Race Population Percentage
Black or African American Alone 12,287 8.03%
White Alone 126,244 82.48%
American Indian and Alaska Native Alone 586 0.38%
Asian Alone 9,873 6.45%
Native Hawaiian And Pacific Islander Alone 94 0.06%
Two Or More Races 3,972 2.6%
Population By Ethnicity in Johnson , IA in 2020
Ethnicity Population Percentage
Black or African American Alone - Hispanic 424 0.28%
White Alone - Hispanic 8,963 5.86%
American Indian and Alaska Native Alone - Hispanic 267 0.17%
Asian Alone - Hispanic 97 0.06%
Native Hawaiian And Pacific Islander Alone - Hispanic 20 0.01%
Two Or More Races - Hispanic 361 0.24%
Black or African American Alone - Non Hispanic 11,863 7.75%
White Alone - Non Hispanic 117,281 76.63%
American Indian and Alaska Native Alone - Non Hispanic 319 0.21%
Asian Alone - Non Hispanic 9,776 6.39%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 74 0.05%
Two Or More Races - Non Hispanic 3,611 2.36%