St. Leonard ZIP code, Maryland
The ZIP code for St. Leonard, MD is 20685, and its area codes are 443, 410 and 667.
- USPS city name
- 1 ZIP code
- Overlapping the city
- 1 more
- Population
- 726
- County
- Calvert County
- State
- Maryland
Also written Saint Leonard, the spelling the Postal Service uses.
NANPA lists no telephone rate centre for St. Leonard itself, so these are the area codes of the nearest one, Prince Frederick (7.2 miles). A town on an area-code boundary can differ from its neighbour.
Mail addressed to St. Leonard uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.
St. Leonard in numbers
About 726 people live in St. Leonard, in 210 households. The median household income is $186,071 a year, 79% above the Maryland median of $103,678 (US: $80,734). The median owner-occupied home is valued at $477,500 (14% above the Maryland median). The median age is 41.5; 21.5% of adults 25 and over hold a bachelor's degree or higher (43.4% across Maryland); the average commute takes 35 minutes.
| Population | 726 |
|---|---|
| Households | 210 |
| Median age | 41.5 |
| Median household income | $186,071 |
| Median home value | $477,500 |
| Bachelor's degree or higher | 21.5% |
| Mean commute | 34.8 min |
| Population density | 318 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place St. Leonard CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.
ZIP codes addressed as Saint Leonard
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
20685 | Saint Leonard , MD | Standard | 6,866 | $119,135 | $450,400 |
Other ZIP codes overlapping St. Leonard
These ZIP codes cover part of St. Leonard but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
20676 | Port Republic , MD | Standard | 3,218 | $156,657 | $509,900 |
Map of St. Leonard ZIP codes
The ZIP codes of St. Leonard, MD, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near St. Leonard
The nearest larger towns are Calvert Beach (1,074 people, 0.6 mi), Long Beach (1,849 people, 1.5 mi) and Prince Frederick (2,955 people, 7.2 mi).
| Town | Population | Distance |
|---|---|---|
| Prince Frederick | 2,955 | 7.2 mi |
| Lusby | 2,595 | 8.0 mi |
| Chesapeake Ranch Estates | 9,241 | 8.8 mi |
| Drum Point | 3,589 | 10.1 mi |
| Golden Beach | 3,830 | 11.0 mi |
| Wildewood | 7,552 | 11.6 mi |
| California | 13,136 | 11.7 mi |
| Huntingtown | 2,689 | 12.0 mi |
| Leonardtown | 4,808 | 13.6 mi |
| Lexington Park | 13,252 | 15.4 mi |
| Chesapeake Beach | 6,456 | 15.6 mi |
| Owings | 2,643 | 17.8 mi |
| Deale | 5,333 | 22.1 mi |
| Cambridge | 13,152 | 23.6 mi |
More nearby: every ZIP code in Calvert County · Maryland ZIP codes
Cite this page
zipcodes.pro. “St. Leonard, MD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/md/st-leonard
Underlying data is public domain or openly licensed — sources, vintages and licences.