St. Mary's County, MD Property Tax Calculator
St. Mary's County homeowners pay a median $3,424 a year in property tax, 0.84% of a median $407,600 home: below Maryland's 0.97% and the national 0.94%.
Property tax in St. Mary's County by home value, at 0.84%
| Home value | A year | A month |
|---|---|---|
| $200,000 | $1,680 | $140 |
| $300,000 | $2,520 | $210 |
| $400,000 | $3,360 | $280 |
| $500,000 | $4,200 | $350 |
| $750,000 | $6,300 | $525 |
| $1,000,000 | $8,400 | $700 |
St. Mary's County against Maryland and the US
| Effective rate | Median tax | Median home value | Median household income | |
|---|---|---|---|---|
| St. Mary's County | 0.84% | $3,424 | $407,600 | $119,446 |
| Maryland | 0.97% | $4,093 | $419,900 | $103,678 |
| United States | 0.94% | $3,119 | $332,700 | $80,734 |
How this calculator works
Median real estate taxes paid ÷ median home value in St. Mary's County, from the Census Bureau's American Community Survey 2020–2024 5-year estimates. The calculator starts at the county's median home value and rate.
What it assumes
- Cities, school districts and special districts within the county levy different rates, so bills vary within it.
- Survey figures cover 2020 to 2024 and lag recent reassessments.
Questions people ask
What is the property tax rate in St. Mary's County?
The effective rate is 0.84%: a median $3,424 a year on a median $407,600 home. That's the 15th highest of the 18 Maryland counties we cover.
How much is property tax on a $400,000 house in St. Mary's County?
About $3,360 a year, $280 a month, at the county's effective rate, before any exemption.
How does St. Mary's County compare with the rest of Maryland?
Its rate is below the state's 0.97%. Across Maryland, covered counties range from 0.73% to 1.46%.
How do I lower my St. Mary's County property tax?
Apply for every exemption you qualify for, such as a homestead exemption, and appeal your assessment if it is higher than comparable homes sold nearby; the county assessor explains the deadlines.
Other Maryland counties
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Sources
Updated by the RateHerald team. The maths is tested against worked examples; report a problem.