Population By Race and Ethnicity in Mercer County, NJ in 2021

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2021, the 382,172 population of Mercer County, New Jersey comprised of 85,294 people who identified as Hispanic (22.32%), and 296,878 people who identified as Non-Hispanic (77.68%).

Race: The White Alone population was the largest racial group in Mercer County, New Jersey with a population of 238,896 (62.51%); Black or African American Alone population was the second largest racial group with a population of 82,313 (21.54%); and Asian Alone was the third largest racial group with a population of 47,051 (12.31%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Mercer County, New Jersey in 2021, with a population of 170,595 (44.64%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 72,212 (18.9%); and the third largest ethnic group was White Alone - Hispanic with a population of 68,301 (17.87%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Mercer, New Jersey.

You can find similar information for other New Jersey counties, and for New Jersey.

See this for other years:
Hispanics and Non Hispanics in Mercer County, NJ in 2021
Total Population:
Race in Mercer County, NJ in 2021
Total Population:
Ethnicity in Mercer County, NJ in 2021
Total Population:
Population By Race in Mercer , NJ in 2021
Race Population Percentage
Black or African American Alone 82,313 21.54%
White Alone 238,896 62.51%
American Indian and Alaska Native Alone 2,991 0.78%
Asian Alone 47,051 12.31%
Native Hawaiian And Pacific Islander Alone 992 0.26%
Two Or More Races 9,929 2.6%
Population By Ethnicity in Mercer , NJ in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 10,101 2.64%
White Alone - Hispanic 68,301 17.87%
American Indian and Alaska Native Alone - Hispanic 2,400 0.63%
Asian Alone - Hispanic 837 0.22%
Native Hawaiian And Pacific Islander Alone - Hispanic 795 0.21%
Two Or More Races - Hispanic 2,860 0.75%
Black or African American Alone - Non Hispanic 72,212 18.9%
White Alone - Non Hispanic 170,595 44.64%
American Indian and Alaska Native Alone - Non Hispanic 591 0.16%
Asian Alone - Non Hispanic 46,214 12.09%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 197 0.05%
Two Or More Races - Non Hispanic 7,069 1.85%