St. Mary's County Property Taxes
St. Mary's County, Maryland
Effective Tax Rate
0.00%
1.9% above state avgMedian Annual Tax
$0
$283/mo escrow
Estimate Your Tax
Annual Tax
$0
Monthly
$0
Eff. Rate
0.87%
At a Glance
Median Home Value
$390,900
State avg ▲ $350,738
Tax w/ Mortgage/yr
$3,446
$287/mo escrow
Tax w/o Mortgage/yr
$3,263
$272/mo
State Tax Rate Rank
#6
of 24 counties (1 = lowest)
Data Story
About Property Taxes in St. Mary's County, Maryland
St. Mary's sits slightly below national median
St. Mary's County's 0.868% effective rate falls just below the national median of 0.87%, placing it in the 45th percentile. With a median home value of $390,900—well above the national median of $281,900—the combination yields a moderate tax burden for homeowners.
Below Maryland's average rate
At 0.868%, St. Mary's effective rate runs about 9% lower than Maryland's state average of 0.957%, ranking it among Maryland's more tax-friendly counties. The $3,392 median tax bill sits just above the state average of $3,328, despite homes here being pricier than average.
Competitive with southern Maryland peers
St. Mary's 0.868% rate edges slightly higher than Talbot County (0.658%) but remains below Prince George's (1.153%) and Washington County (0.886%). The $3,392 median tax is moderate compared to similar-priced homes in neighboring Prince George's County.
About $3,392 per year on average
A homeowner with St. Mary's median property value of $390,900 pays roughly $3,392 annually in property taxes. Over 30 years, that amounts to approximately $101,000 in cumulative property taxes.
Assessment appeals could help significantly
If your home has appreciated faster than county assessments reflect, you may be paying on an outdated value. Filing a simple reassessment challenge could reduce your annual tax by several hundred dollars.
How St. Mary's County Compares
Median Annual Property Tax
St. Mary's County
0.87%
Effective rate
Maryland Avg
0.95%
Effective rate
National Avg
0.91%
Effective rate
Frequently Asked Questions
What is the property tax rate in St. Mary's County, Maryland?
How much are property taxes in St. Mary's County?
How does St. Mary's County compare to the Maryland average?
What is the median home value in St. Mary's County, Maryland?
Is St. Mary's County a low property tax area in Maryland?
How does St. Mary's County rank for property taxes in Maryland?
Counties with Similar Tax Rates
Nearby Counties
Other Counties in Maryland
Talbot County
0.66%
Worcester County
0.76%
Queen Anne's County
0.79%
Garrett County
0.83%
Anne Arundel County
0.85%
Montgomery County
0.87%
Calvert County
0.88%
Washington County
0.89%
Wicomico County
0.89%
Caroline County
0.92%
Harford County
0.93%
Kent County
0.94%
Carroll County
0.94%
Dorchester County
0.95%
Somerset County
0.98%
Data updated: March 2026
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates. Effective tax rate is calculated as median property tax divided by median home value.