St. Mary's County, Maryland Census 2020 Population By Race and Ethnicity

Updated on April 9, 2023.

According to the data from the US 2020 decennial Census, in April 2020, the 113.78K population of St. Mary's County, MD residents comprised of 6.55K residents who identified as Hispanic or Latino (5.75%), and 107.23K residents who identified as Non-Hispanic (94.25%).

Race: The White Alone population was the largest racial group in St. Mary's County, MD, with a population of 81.95K (72.03%). The Black or African American Alone population was the second largest racial group in St. Mary's County, MD, with a population of 16.29K (14.32%). The Two Or More Races population was the third largest racial group in St. Mary's County, MD, with a population of 9.36K (8.23%). The smallest racial group in St. Mary's County, MD was Native Hawaiian And Pacific Islander Alone with a population of 90 (0.08%).

Ethnicity: The Non-Hispanic - White Alone population was the largest ethnic group in St. Mary's County, MD, with a population of 80.23K (70.52%). The Non-Hispanic - Black Alone population was the second largest ethnic group in St. Mary's County, MD, with a population of 15.99K (14.06%). The Non-Hispanic - Two or More Races population was the third largest ethnic group in St. Mary's County, MD, with a population of 6.77K (5.95%). The smallest ethnic group in St. Mary's County, MD was Hispanic - Native Hawaiian & Pac. Islander with a population of 4 (0.00%).

The charts and tables below shows the population and percentage of each racial group and ethnicity group in St. Mary's County, Maryland from the 2020 decennial census.

You can see similar information for other Maryland counties and also for the state of Maryland.

St. Mary's County, MD Hispanics and Non Hispanics Population in Census 2020
Total Population:
St. Mary's County, MD Racial Groups in Census 2020
Total Population:
St. Mary's County, MD Ethnicity Groups in Census 2020
Total Population:
St. Mary's County, MD Population of Racial Groups in Census 2020
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Race Population % of County Population
Black or African American Alone 16294 14.32
White Alone 81952 72.03
American Indian and Alaska Native Alone 438 0.39
Asian Alone 3362 2.96
Native Hawaiian And Pacific Islander Alone 90 0.08
Some Other Race Alone 2279 2.00
Two Or More Races 9362 8.23
St. Mary's County, MD Population of Ethnicity Groups in Census 2020
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Ethnicity Population % of County Population
Non-Hispanic - White Alone 80233 70.52
Non-Hispanic - Black Alone 15994 14.06
Non-Hispanic - Two or More Races 6767 5.95
Non-Hispanic - Asian Alone 3301 2.90
Hispanic - Two or More Races 2595 2.28
Hispanic - Some Other Race Alone 1746 1.54
Hispanic - White Alone 1719 1.51
Non-Hispanic - Some Other Race Alone 533 0.47
Non-Hispanic - American Indian & Alaska Native 318 0.28
Hispanic - Black Alone 300 0.26
Hispanic - American Indian & Alaska Native 120 0.11
Non-Hispanic - Native Hawaiian & Pac. Islander 86 0.08
Hispanic - Asian Alone 61 0.05
Hispanic - Native Hawaiian & Pac. Islander 4 0.00