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County · Maryland

St. Mary's County

116,469Population
2.4 %Change since 2020
74Net migration
3.4 %Unemployment rate

Facts

Population
116,469 (2024)
Change since 2020
2.4 %
Net migration
74 (2023)
Unemployment rate
3.4 % (2025)
Population base, April 2020
113,778 (2020)
Births
1,406 (2023)
Births per 1,000 residents, 2023
12.1
Deaths
988 (2023)
Deaths per 1,000 residents, 2023
8.5
Natural change, 2023
418
International migration
177 (2023)
Domestic migration
-103 (2023)
Net migration per 1,000, 2023
0.6
Postal code
MD
FIPS code
24037

Sources: US Census Bureau — Population Estimates, Bureau of Labor Statistics — LAUS

Unemployment rate, annual average

199020253.44.1
PeriodValue
20253.4 %
20242.9 %
20232.1 %
20222.8 %
20214.0 %
20204.6 %
20193.1 %
20183.6 %
20173.7 %
20163.9 %
20154.8 %
20145.3 %

Population estimates, 2020–2024

20202024116.5K114K
PeriodValue
2024116,469
2023115,479
2022115,001
2021114,674
2020114,006