St. Mary's County, MD Demographics & Local Data

Analyze population trends, housing costs, and the local economy by exploring Map AI.

Area Snapshot

Key statistics on population, economy, housing, and commuting compared to state and national averages. Explore interactive maps for deeper analysis.

B
B
B

Population

Metric St. Mary's County Maryland Avg U.S. Average
Population 115,352 6,103,597 334,821,731
Population density (per sq mi) 151.0 492.0 85.8
Population growth (%/yr) 0.47% 0.50% 0.57%
Median age 38.7 37.9 37.1
Households 41,743 2,338,890 128,459,983

Population Over Time

Year St. Mary's County

Race & Ethnicity

Group Share

Economy

St. Mary's County has a the economy index of B, which means it is quite prosperous.

Metric St. Mary's County Maryland Avg U.S. Average
Median household income $115,463 $101,971 $78,145
Income growth (%/yr) 4.25% 4.27% 5.07%
Unemployment rate 3.7% 4.9% 5.2%

Detailed wealth and income breakdown →

Housing

Metric St. Mary's County Maryland Avg U.S. Average
Median home price $359,433 $285,029 $242,182
Median rent $1,692 $1,661 $1,342
Homeownership rate 72.6% 67.5% 65.1%

Full housing market analysis →

Mobility & Commuting

The most common departure window is 07:00 AM – 07:29 AM , followed by 06:30 AM – 06:59 AM .

Metric St. Mary's County Maryland Avg U.S. Average
Average commute time (min) 22.6 28.8 22.5
Work from home 15.3% 17.2% 13.4%

Commute and transport details →

Education & Households

St. Mary's County has a education index of B, which means it is quite educated.

Metric St. Mary's County Maryland Avg U.S. Average
Bachelor's degree or higher 32.5% 39.3% 31.6%
Average household size 2.68 2.58 2.54

Health

St. Mary's County has a health index of B, which means it is quite healthy.

Metric St. Mary's County Maryland Avg U.S. Average
Life expectancy (years) 80.8 78.4 78.3
Self-rated poor health 11.5% 13.2% 16.3%
Smokers 16.7% 15.9% 19.0%