St. Mary's County, Maryland
Population estimates, July 1, 2025, (V2025) 116,692
People
Population
Population estimates, July 1, 2025, (V2025) 116,692
Population estimates, July 1, 2024, (V2024) 116,469
Population estimates base, April 1, 2020, (V2025) 113,772
Population estimates base, April 1, 2020, (V2024) 113,778
Population, percent change - April 1, 2020 (estimates base) to July 1, 2025, (V2025) 2.6%
Population, percent change - April 1, 2020 (estimates base) to July 1, 2024, (V2024) 2.4%
Population, Census, April 1, 2020 113,777
Population, Census, April 1, 2010 105,151
Age and Sex
Persons under 5 years, percent 6.2%
Persons under 18 years, percent 23.7%
Persons 65 years and over, percent 15.1%
Female persons, percent 49.6%
Race and Hispanic Origin
White alone, percent 76.0%
Black alone, percent(a) 16.2%
American Indian and Alaska Native alone, percent(a) 0.5%
Asian alone, percent(a) 3.1%
Native Hawaiian and Other Pacific Islander alone, percent(a) 0.1%
Two or More Races, percent 4.0%
Hispanic or Latino, percent(b) 6.6%
White alone, not Hispanic or Latino, percent 70.7%
Population Characteristics
Veterans, 2020-2024 12,208
Foreign-born persons, percent, 2020-2024 4.3%
Housing
Housing Units, July 1, 2025, (V2025) 47,212
Owner-occupied housing unit rate, 2020-2024 73.2%
Median value of owner-occupied housing units, 2020-2024 $407,600
Median selected monthly owner costs - with a mortgage, 2020-2024 $2,268
Median selected monthly owner costs - without a mortage, 2020-2024 $681
Median gross rent, 2020-2024 $1,747
Building Permits, 2025 282
Families & Living Arrangements
Households, 2020-2024 42,436
Persons per household, 2020-2024 2.65
Living in the same house 1 year ago, percent of persons age 1 year+ , 2020-2024 87.6%
Language other than English spoken at home, percent of persons age 5 years+, 2020-2024 7.3%
Computer and Internet Use
Households with a computer, percent, 2020-2024 95.6%
Households with a broadband Internet subscription, percent, 2020-2024 93.1%
Education
High school graduate or higher, percent of persons age 25 years+, 2020-2024 92.7%
Bachelor's degree or higher, percent of persons age 25 years+, 2020-2024 36.5%
Health
With a disability, under age 65 years, percent, 2020-2024 8.9%
Persons without health insurance, under age 65 years, percent 5.4%
Economy
In civilian labor force, total, percent of population age 16 years+, 2020-2024 65.3%
In civilian labor force, female, percent of population age 16 years+, 2020-2024 61.3%
Total accommodation and food services sales, 2022 ($1,000)(c) 291,526
Total health care and social assistance receipts/revenue, 2022 ($1,000)(c) 720,556
Total transportation and warehousing receipts/revenue, 2022 ($1,000)(c) 226,321
Total retail sales, 2022 ($1,000)(c) 1,774,691
Total retail sales per capita, 2022(c) $15,461
Transportation
Mean travel time to work (minutes), workers age 16 years+, 2020-2024 29.9
Income & Poverty
Median households income (in 2024 dollars), 2020-2024 $119,446
Per capita income in past 12 months (in 2024 dollars), 2020-2024 $53,417
Persons in poverty, percent 7.9%
Businesses
Businesses
Total employer establishments, 2023 2,090
Total employment, 2023 32,683
Total annual payroll, 2023 ($1,000) 2,216,873
Total employment, percent change, 2022-2023 Z
Total nonemployer establishments, 2023 8,396
All employer firms, Reference year 2023 1,939
Male-owned employer firms, Reference year 2023 984
Female-owned employer firms, Reference year 2023 403
Minority-owned employer firms, Reference year 2023 408
Nonminority-owned employer firms, Reference year 2023 1,254
Veteran-owned employer firms, Reference year 2023 254
Nonveteran-owned employer firms, Reference year 2023 1,367
Geography
Geography
Population per square mile, 2020 317.3
Population per square mile, 2010 294.4
Land area in square miles, 2020 358.62
Land area in square miles, 2010 357.18
FIPS Code 24037