Cost of Living in St. Mary's County, MD

Modeled annual cost: $61,765.

Median family income: $133,566.

Affordability Snapshot

MD County Median

$55,685

State Rank

8thMost expensive counties in MD out of 24See Maryland county rankings

Median Income

$133,566

Location Type

Metro

Biggest category:

Housing is the biggest expense in St. Mary's County, MD.

$17,916 per year.

Cost breakdown

Total

$61,765

Per year

  • Housing:$17,916
  • Transport:$14,781
  • Taxes:$13,500
  • Other Costs:$6,917
  • Food:$4,362
  • Healthcare:$4,290
  • Childcare:$0

* Percentages may not add up to 100% due to rounding.

Cheaper counties in Maryland

1Allegany County, MD
$40,419
2Washington County, MD
$44,148
3Garrett County, MD
$45,316
4Dorchester County, MD
$45,716
5Somerset County, MD
$46,093

Popular comparisons in Maryland

See how St. Mary's County, MD compares across the country.

Explore our cost of living interactive map to compare St. Mary's County, MD with multiple counties in the United States.

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Cost of Living in St. Mary's County, MD (2026)