St. Mary's County property tax
Homeowners in St. Mary's County, Maryland typically pay about 0.84% of their home's value in property tax each year — a median bill of $3,424 on a median home value of $407,600.
Typical effective rate
0.84%
higher than 47% of U.S. counties
Median tax paid
$3,424
per year
Median home value
$407,600
In MD
#19
of 24 ranked counties
At a glance
- Effective rate 0.84% — 10% lower than the U.S. median of 0.94%, and 14% lower than the Maryland median of 0.97%.
- With vs. without a mortgage — median tax $3,436 for mortgaged homes, $3,397 for homes owned outright.
- State ranking — 19th highest effective rate of 24 ranked Maryland counties; nationally it sits around the 53th percentile.
Estimate a bill for St. Mary's County
Apply this county's typical effective rate (0.84%) to a home value of your choice.
Frequently asked questions
What is the property tax rate in St. Mary's County, MD?
The typical effective property-tax rate in St. Mary's County is 0.84% of a home's value per year, based on median taxes paid ($3,424) divided by the median home value ($407,600) in the Census ACS 2020–2024 5-year estimates. This is a typical burden for comparison, not a statutory mill rate.
How much is property tax on a typical home in St. Mary's County?
The median owner-occupied home in St. Mary's County is valued at $407,600, and the median real estate tax paid is $3,424 per year. Homes with a mortgage have a median tax of $3,436, versus $3,397 for homes without one.
How does St. Mary's County compare to the rest of Maryland?
St. Mary's County's effective rate is 14% lower than the Maryland median, ranking 19th of 24 ranked counties in the state.
Compare nearby Maryland counties
Counties ranked closest to St. Mary's County by in-state effective rate. Open the comparison tool or see all Maryland counties.
| In-state | County | Effective rate | Median tax |
|---|---|---|---|
| 16 | Wicomico County | 0.85% | $2,171 |
| 17 | Anne Arundel County | 0.85% | $3,957 |
| 18 | Calvert County | 0.84% | $3,885 |
| 20 | Washington County | 0.84% | $2,481 |
| 21 | Queen Anne's County | 0.78% | $3,623 |
| 22 | Garrett County | 0.78% | $1,836 |
Official data & resources for St. Mary's County
- St. Mary's County Census profile (data.census.gov) — housing, value and tax figures for this county.
- Table B25103 for St. Mary's County — median real estate taxes paid (the source for the tax figures above).
- Table B25077 for St. Mary's County — median home value.
- Federal forms & is property tax deductible? — IRS Pub 530, Schedule A and the SALT cap, plus your state tax agency.
Finding your exact bill
Your county or municipal assessor (sometimes called the appraisal district, property appraiser, or tax collector) sets the assessed value and the exact millage that produces your bill. Search for "[county name] [state] assessor" or "property tax" on an official .gov site.
Figures on this page are Census survey medians for the whole county (2020–2024 5-year), not an assessment of any individual property. Rates, exemptions and assessment practices vary by municipality and school district within a county.