Population By Race and Ethnicity in Rock Island, IL in 2018

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2018, the 142,522 population of Rock Island County, Illinois comprised of 18,709 people who identified as Hispanic (13.13%), and 123,813 people who identified as Non-Hispanic (86.87%).

Race: The White Alone population was the largest racial group in Rock Island County, Illinois with a population of 117,895 (82.72%); Black or African American Alone population was the second largest racial group with a population of 15,719 (11.03%); and Two Or More Races was the third largest racial group with a population of 4,221 (2.96%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Rock Island County, Illinois in 2018, with a population of 101,530 (71.24%); the second largest ethnic group was White Alone - Hispanic with a population of 16,365 (11.48%); and the third largest ethnic group was Black or African American Alone - Non Hispanic with a population of 14,870 (10.43%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Rock Island, Illinois.

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

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Hispanics and Non Hispanics in Rock Island, IL in 2018
Total Population:
Race in Rock Island, IL in 2018
Total Population:
Ethnicity in Rock Island, IL in 2018
Total Population:
Population By Race in Rock Island , IL in 2018
Race Population Percentage
Black or African American Alone 15,719 11.03%
White Alone 117,895 82.72%
American Indian and Alaska Native Alone 889 0.62%
Asian Alone 3,731 2.62%
Native Hawaiian And Pacific Islander Alone 67 0.05%
Two Or More Races 4,221 2.96%
Population By Ethnicity in Rock Island , IL in 2018
Ethnicity Population Percentage
Black or African American Alone - Hispanic 849 0.6%
White Alone - Hispanic 16,365 11.48%
American Indian and Alaska Native Alone - Hispanic 610 0.43%
Asian Alone - Hispanic 120 0.08%
Native Hawaiian And Pacific Islander Alone - Hispanic 15 0.01%
Two Or More Races - Hispanic 750 0.53%
Black or African American Alone - Non Hispanic 14,870 10.43%
White Alone - Non Hispanic 101,530 71.24%
American Indian and Alaska Native Alone - Non Hispanic 279 0.2%
Asian Alone - Non Hispanic 3,611 2.53%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 52 0.04%
Two Or More Races - Non Hispanic 3,471 2.44%