Population By Race and Ethnicity in Marion, IA in 2018

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2018, the 33,251 population of Marion County, Iowa comprised of 676 people who identified as Hispanic (2.03%), and 32,575 people who identified as Non-Hispanic (97.97%).

Race: The White Alone population was the largest racial group in Marion County, Iowa with a population of 31,976 (96.17%); Asian Alone population was the second largest racial group with a population of 457 (1.37%); and Two Or More Races was the third largest racial group with a population of 431 (1.3%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Marion County, Iowa in 2018, with a population of 31,384 (94.39%); the second largest ethnic group was White Alone - Hispanic with a population of 592 (1.78%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 453 (1.36%).

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

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

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Hispanics and Non Hispanics in Marion, IA in 2018
Total Population:
Race in Marion, IA in 2018
Total Population:
Ethnicity in Marion, IA in 2018
Total Population:
Population By Race in Marion , IA in 2018
Race Population Percentage
Black or African American Alone 294 0.88%
White Alone 31,976 96.17%
American Indian and Alaska Native Alone 79 0.24%
Asian Alone 457 1.37%
Native Hawaiian And Pacific Islander Alone 14 0.04%
Two Or More Races 431 1.3%
Population By Ethnicity in Marion , IA in 2018
Ethnicity Population Percentage
Black or African American Alone - Hispanic 14 0.04%
White Alone - Hispanic 592 1.78%
American Indian and Alaska Native Alone - Hispanic 30 0.09%
Asian Alone - Hispanic 4 0.01%
Native Hawaiian And Pacific Islander Alone - Hispanic 3 0.01%
Two Or More Races - Hispanic 33 0.1%
Black or African American Alone - Non Hispanic 280 0.84%
White Alone - Non Hispanic 31,384 94.39%
American Indian and Alaska Native Alone - Non Hispanic 49 0.15%
Asian Alone - Non Hispanic 453 1.36%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 11 0.03%
Two Or More Races - Non Hispanic 398 1.2%