Population By Race and Ethnicity in Johnson County, IA in 2021

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2021, the 155,035 population of Johnson County, Iowa comprised of 10,401 people who identified as Hispanic (6.71%), and 144,634 people who identified as Non-Hispanic (93.29%).

Race: The White Alone population was the largest racial group in Johnson County, Iowa with a population of 127,694 (82.37%); Black or African American Alone population was the second largest racial group with a population of 12,687 (8.18%); and Asian Alone was the third largest racial group with a population of 9,853 (6.36%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Johnson County, Iowa in 2021, with a population of 118,497 (76.43%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 12,258 (7.91%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 9,762 (6.3%).

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 2021
Total Population:
Race in Johnson County, IA in 2021
Total Population:
Ethnicity in Johnson County, IA in 2021
Total Population:
Population By Race in Johnson , IA in 2021
Race Population Percentage
Black or African American Alone 12,687 8.18%
White Alone 127,694 82.37%
American Indian and Alaska Native Alone 604 0.39%
Asian Alone 9,853 6.36%
Native Hawaiian And Pacific Islander Alone 101 0.07%
Two Or More Races 4,096 2.64%
Population By Ethnicity in Johnson , IA in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 429 0.28%
White Alone - Hispanic 9,197 5.93%
American Indian and Alaska Native Alone - Hispanic 284 0.18%
Asian Alone - Hispanic 91 0.06%
Native Hawaiian And Pacific Islander Alone - Hispanic 20 0.01%
Two Or More Races - Hispanic 380 0.25%
Black or African American Alone - Non Hispanic 12,258 7.91%
White Alone - Non Hispanic 118,497 76.43%
American Indian and Alaska Native Alone - Non Hispanic 320 0.21%
Asian Alone - Non Hispanic 9,762 6.3%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 81 0.05%
Two Or More Races - Non Hispanic 3,716 2.4%