Population By Race and Ethnicity in New Castle County, DE in 2021

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2021, the 572,714 population of New Castle County, Delaware comprised of 63,299 people who identified as Hispanic (11.05%), and 509,415 people who identified as Non-Hispanic (88.95%).

Race: The White Alone population was the largest racial group in New Castle County, Delaware with a population of 362,778 (63.34%); Black or African American Alone population was the second largest racial group with a population of 155,076 (27.08%); and Asian Alone was the third largest racial group with a population of 35,105 (6.13%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in New Castle County, Delaware in 2021, with a population of 313,415 (54.73%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 146,411 (25.56%); and the third largest ethnic group was White Alone - Hispanic with a population of 49,363 (8.62%).

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

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

See this for other years:
Hispanics and Non Hispanics in New Castle County, DE in 2021
Total Population:
Race in New Castle County, DE in 2021
Total Population:
Ethnicity in New Castle County, DE in 2021
Total Population:
Population By Race in New Castle , DE in 2021
Race Population Percentage
Black or African American Alone 155,076 27.08%
White Alone 362,778 63.34%
American Indian and Alaska Native Alone 2,956 0.52%
Asian Alone 35,105 6.13%
Native Hawaiian And Pacific Islander Alone 437 0.08%
Two Or More Races 16,362 2.86%
Population By Ethnicity in New Castle , DE in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 8,665 1.51%
White Alone - Hispanic 49,363 8.62%
American Indian and Alaska Native Alone - Hispanic 1,876 0.33%
Asian Alone - Hispanic 522 0.09%
Native Hawaiian And Pacific Islander Alone - Hispanic 281 0.05%
Two Or More Races - Hispanic 2,592 0.45%
Black or African American Alone - Non Hispanic 146,411 25.56%
White Alone - Non Hispanic 313,415 54.73%
American Indian and Alaska Native Alone - Non Hispanic 1,080 0.19%
Asian Alone - Non Hispanic 34,583 6.04%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 156 0.03%
Two Or More Races - Non Hispanic 13,770 2.4%