State rank#12 of 24
Smallest county115,126 residentsMontgomery County
Published county profile · Official data · FIPS 24037
St. Mary's County, Maryland
County-level income, housing, jobs, education, health, and population with transparent statewide comparisons and source periods.
Population115,126
Household income$119,446
Unemployment2.7%
Life expectancy77 years
County overview
Living metrics at a glance
St. Mary's County has 115,126 residents and ranks #12 by population among Maryland county equivalents. Median household income is $119,446. The annual-average unemployment rate is 2.7%. Its clearest relative strength is unemployment rate. Its county population is above the state county median. Every figure below stays at county scope.
Within Maryland
County population range
The marker places this county between the smallest and largest county populations in the state.
Relocation guide
Moving to St. Mary's County: what to check
Data narrows the search; municipality, neighborhood, commute, schools, and current listings complete the decision.
Before moving
Before moving, compare municipalities inside St. Mary's County, because county averages do not describe every neighborhood. Review current housing inventory, commute destinations, school districts, healthcare access, and job locations. Its clearest relative strength is unemployment rate.
Cost and housing
Housing benchmarks are $407,600 median home value and $1,747/mo median gross rent. Set those costs against a median household income of $119,446, while remembering that household circumstances and municipalities vary.
Who it may suit
St. Mary's County may be worth a closer look for movers prioritizing unemployment rate, median household income, and uninsured. College attainment is 36.5% and life expectancy is 77 years.
Potential advantages
- Unemployment rate: 2.7%, rank #6 of 24 available Maryland counties.
- Median household income: $119,446, rank #7 of 24 available Maryland counties.
- Uninsured: 5.3%, rank #8 of 24 available Maryland counties.
Trade-offs to check
- Mental health access: 1 per 659 residents, rank #23 of 24; investigate local variation before moving.
- Primary care access: 1 per 2,725 residents, rank #20 of 24; investigate local variation before moving.
- Median gross rent: $1,747/mo, rank #17 of 24; investigate local variation before moving.
Income, housing, jobs, education & health
County metrics within Maryland
Rank and range use only counties in Maryland with that field available. A lower rank number is stronger when the metric has a clear direction.
Median household income
$119,446
$119,446; above the state county median of $91,888.
State rank #7 of 24 · U.S. Census Bureau — American Community Survey
Median home value
$407,600
$407,600; above the state county median of $380,550.
State rank #14 of 24 · U.S. Census Bureau — American Community Survey
Median gross rent
$1,747/mo
$1,747/mo; above the state county median of $1,402/mo.
State rank #17 of 24 · U.S. Census Bureau — American Community Survey
Unemployment rate
2.7%
2.7%; below the state county median of 3.2%.
State rank #6 of 24 · U.S. Bureau of Labor Statistics — Local Area Unemployment Statistics
Bachelor’s degree or higher
36.5%
36.5%; below the state county median of 36.6%.
State rank #13 of 24 · U.S. Census Bureau — American Community Survey
Life expectancy
77 years
77 years; above the state county median of 76.9 years.
State rank #12 of 24 · County Health Rankings & Roadmaps
Poor or fair health
16.5%
16.5%; above the state county median of 15.6%.
State rank #15 of 24 · County Health Rankings & Roadmaps
Uninsured
5.3%
5.3%; below the state county median of 6.1%.
State rank #8 of 24 · County Health Rankings & Roadmaps
Primary care access
1 per 2,725 residents
1 per 2,725 residents; above the state county median of 1 per 1,867 residents.
State rank #20 of 24 · County Health Rankings & Roadmaps
Mental health access
1 per 659 residents
1 per 659 residents; above the state county median of 1 per 356 residents.
State rank #23 of 24 · County Health Rankings & RoadmapsCommon questions
St. Mary's County FAQ
Is St. Mary's County a good place to live?
St. Mary's County may be worth a closer look for movers prioritizing unemployment rate, median household income, and uninsured. College attainment is 36.5% and life expectancy is 77 years.
What should I know before moving to St. Mary's County?
Start with housing, employment, commute, schools, healthcare access, and the specific municipality. Housing benchmarks are $407,600 median home value and $1,747/mo median gross rent. Set those costs against a median household income of $119,446, while remembering that household circumstances and municipalities vary.
What is the population of St. Mary's County?
St. Mary's County has 115,126 residents in the 2020–2024 ACS 5-year dataset.
What is the FIPS code for St. Mary's County?
The five-digit county FIPS code is 24037; the parent state FIPS is 24.
What is the median household income in St. Mary's County?
The ACS median household income is $119,446.
How much does housing cost in St. Mary's County?
Housing benchmarks are $407,600 median home value and $1,747/mo median gross rent. Set those costs against a median household income of $119,446, while remembering that household circumstances and municipalities vary.
What is the unemployment rate in St. Mary's County?
The BLS LAUS annual-average unemployment rate is 2.7%.
Similar population
Nearby counties in the state ranking
Source and gate
Methodology and source periods
All records join by five-digit FIPS. Profiles publish when ACS county population is at least 100,000 or the county is the state’s largest. Missing source values remain unavailable and are excluded from ranks. Runtime data was generated 2026-07-26.
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