St. Mary's County
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- Population
- 115,126
- Area
- 358.57 sq mi (928.68 km²), 405.69 sq mi water
- Median age
- 37.2
- Households
- 42,436
- Persons per household
- 2.7
- Median household income
- $119,446
- Median house value
- $407,600
Demographics: 2020–2024 ACS
This Afternoon
84°F
Mostly Sunny2% precip
Tonight
65°F
Mostly Clear1% precip
Friday
86°F
Mostly Sunny2% precip
Friday Night
60°F
Chance Rain Showers53% precip