St. Mary's County, Maryland property search
Search an address or an owner in St. Mary's County, Maryland with the box at the top of the map, or tap a lot, for its owner, lines and acreage. 52,222 lots are mapped here, covering 247,764 acres. 3,259 of them are held by institutions rather than by individuals.
Farmers and landowners in St. Mary's County received $2.3 million in federal farm program payments in 2025, paid to 173 recipients. 65 acres of agricultural land here are disclosed as foreign-held, the most by owners from Canada. Crop insurance paid $832,000 in claims for the 2024 crop year.
- 52,222
- Lots mapped
- 247,764
- Acres
- 3,259
- Institutional
Land use in St. Mary's County
Parcels and acreage by land use in St. Mary's County, Maryland| Land use | Parcels | Acres |
|---|
| Residential | 38,209 | 96,554 |
|---|
| Town House | 3,307 | 324 |
|---|
| Agricultural | 2,938 | 113,963 |
|---|
| Exempt | 1,886 | 2,627 |
|---|
| Commercial | 1,508 | 6,513 |
|---|
| Exempt Commercial | 1,209 | 25,226 |
|---|
| Residential Condominium | 1,090 | 67 |
|---|
| Apartments | 167 | 878 |
|---|
| Commercial Condominium | 147 | 46 |
|---|
| Industrial | 93 | 1,123 |
|---|
| Marsh Land | 14 | 237 |
|---|
| Commercial/Residential | 1 | 10 |
|---|
Largest landowners in St. Mary's County
Largest landowners by acreage in St. Mary's County, Maryland| Owner | Parcels | Acres |
|---|
| STATE OF MARYLAND | 80 | 4,711 |
|---|
| LUNDEBERG MD SEAMANSHIP SCHOOL | 3 | 922 |
|---|
| INDIANTOWN FARM INC | 1 | 874 |
|---|
| STATE OF MARYLAND DEPARTMENT OF | 2 | 835 |
|---|
| BOARD OF COUNTY COMMISSIONERS | 30 | 725 |
|---|
| VALLANDINGHAM FARMS LLC | 4 | 629 |
|---|
| GWYNN PARK LIMITED PARTNERSHIP | 3 | 550 |
|---|
| ST MARYS COUNTY COMMISSIONERS | 25 | 549 |
|---|
| SOUTHSTAR LIMITED PARTNERSHIP | 8 | 546 |
|---|
| BOARD OF EDUCATION | 19 | 526 |
|---|
Companies, trusts and public agencies, ranked by acres held under the name on the assessor's file. Private individuals are not ranked. Largest landowners in Maryland
Federal farm payments in St. Mary's County
- $2.3M
- Paid in 2025
- 173
- Recipients
Federal farm program payments by program in St. Mary's County, Maryland, 2025| Program | Paid |
|---|
| Emergency Commodity Assistance Program | $917K |
|---|
| Agricultural Risk Coverage Program - County | $673K |
|---|
| Supplemental Disaster Relief Non-Spec Crops | $488K |
|---|
| Marketing Assistance for Specialty Crops | $96K |
|---|
| CRP Payment - Annual Rental | $88K |
|---|
USDA Farm Service Agency payment files, 2025. Compare farm subsidies by county
Foreign-held farmland in St. Mary's County
- 65
- Acres disclosed
- 1
- Holdings
Foreign-held agricultural land by country in St. Mary's County, Maryland, 2024| Country | Acres |
|---|
| Canada | 65 |
|---|
Largest disclosed holders
Largest foreign holders of agricultural land in St. Mary's County, Maryland| Holder (country) | Acres |
|---|
| Reactivate MD Development, LLC (CANADA) | 65 |
|---|
USDA Agricultural Foreign Investment Disclosure Act filings, holdings at the end of 2024. Only disclosed interests are counted. See foreign-owned farmland by county
Crop insurance in St. Mary's County
- 137
- Policies
- 22,223
- Insured acres
- $832K
- Claims paid
- 0.77
- Loss ratio
Crop insurance claims by crop in St. Mary's County, Maryland, 2024| Crop | Claims |
|---|
| Corn | $486K |
|---|
| Soybeans | $326K |
|---|
| Wheat | $20K |
|---|
| Grain Sorghum | $25 |
|---|
USDA Risk Management Agency Summary of Business, 2024 crop year.
Conservation and the power grid
- 634
- CRP acres, 2025
- 27
- Substations
- 230 kV
- Highest voltage
Conservation Reserve Program acres under contract (USDA FSA). Substations in service, from a public copy of the federal HIFLD layer.
Find out who owns a property in St. Mary's County by address, free, or work out a lot's acreage.
This copy of St. Mary's County's records was taken on August 12, 2026. Assessment records, not a survey.