St. Mary's County property tax rates, 2025–26

Combined rates for each of 2 places, lowest first. Each page shows the rate of every taxing unit that makes up the total.

Lowest combined rate
0.9598St. Mary's County (outside towns)
Highest combined rate
1.0801Leonardtown
Places
22025–26
St. Mary's County (outside towns) 1 0.9598 0.9598
Leonardtown 1 1.0801 1.0801

Rates are per $100 of assessed value, 2025–26.

Source: Maryland State Department of Assessments and Taxation, 2025-2026 Tax Rates & Homestead Credit Caps. Retrieved 2026-10-24.

Property tax in St. Mary's County

In 2025–26, combined rates in St. Mary's County run from 0.9598 in St. Mary's County (outside towns) to 1.0801 in Leonardtown, per $100 of assessed value. On an assessed value of $300,000, that's $2,879 to $3,240 a year before credits or relief.

Maryland property is taxed by the state, the county and, inside an incorporated town or city, the town. The Department of Assessments and Taxation publishes all three rates for every jurisdiction; the combined rate here is their sum.

Choose a place above to see each rate that makes up its total and estimate a bill, or read the Maryland property tax guide.