Population By Race and Ethnicity in St. Mary's County, MD in 2010

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2010, the 105,772 population of St. Mary's County, Maryland comprised of 4,058 people who identified as Hispanic (3.84%), and 101,714 people who identified as Non-Hispanic (96.16%).

Race: The White Alone population was the largest racial group in St. Mary's County, Maryland with a population of 84,148 (79.56%); Black or African American Alone population was the second largest racial group with a population of 15,253 (14.42%); and Two Or More Races was the third largest racial group with a population of 3,109 (2.94%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in St. Mary's County, Maryland in 2010, with a population of 80,924 (76.51%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 14,931 (14.12%); and the third largest ethnic group was White Alone - Hispanic with a population of 3,224 (3.05%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in St. Mary's, Maryland.

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

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Hispanics and Non Hispanics in St. Mary's County, MD in 2010
Total Population:
Race in St. Mary's County, MD in 2010
Total Population:
Ethnicity in St. Mary's County, MD in 2010
Total Population:
Population By Race in St. Mary's , MD in 2010
Race Population Percentage
Black or African American Alone 15,253 14.42%
White Alone 84,148 79.56%
American Indian and Alaska Native Alone 470 0.44%
Asian Alone 2,700 2.55%
Native Hawaiian And Pacific Islander Alone 92 0.09%
Two Or More Races 3,109 2.94%
Population By Ethnicity in St. Mary's , MD in 2010
Ethnicity Population Percentage
Black or African American Alone - Hispanic 322 0.3%
White Alone - Hispanic 3,224 3.05%
American Indian and Alaska Native Alone - Hispanic 125 0.12%
Asian Alone - Hispanic 75 0.07%
Native Hawaiian And Pacific Islander Alone - Hispanic 28 0.03%
Two Or More Races - Hispanic 284 0.27%
Black or African American Alone - Non Hispanic 14,931 14.12%
White Alone - Non Hispanic 80,924 76.51%
American Indian and Alaska Native Alone - Non Hispanic 345 0.33%
Asian Alone - Non Hispanic 2,625 2.48%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 64 0.06%
Two Or More Races - Non Hispanic 2,825 2.67%