St. Leonard is a community in Calvert County, Maryland, home to about 726 people across 2.3 square miles. It has no ZIP code of its own: it’s part of 20676 and 20685.
Homes sold for a median of $241 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Part is in St. Leonard
Mostly Long Beach; part is in St. Leonard
Each card is that ZIP code’s whole market, including any part outside St. Leonard. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Ronald Reagan Washington National Airport (DCA)40 miles away |
|---|---|
| Nearest city of 250,000+ | Washington, DC41 miles away |
| Nearest city of 1 million+ | Philadelphia, PA130 miles away |
Straight-line distances from the center of St. Leonard; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
St. Leonard had 778 residents in the 2020 census, up 45% since 2000.
It’s the 360th largest of 527 towns in Maryland by population.
Calvert County grew from 10,223 residents in 1900 to 92,783 in 2020.
Calvert County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 30°F. About 45.4 inches of rain and melted snow fall in a typical year, with about 13 inches of snow.
Source: NOAA 1991–2020 climate normals, Patuxent River Nas, MD weather station (12 miles away).
19,204 jobs at 1,725 businesses in Calvert County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
4 doctors and other health care providers list an office in St. Leonard’s ZIP codes.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 2 |
|---|---|
| Mental health providers | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Museums
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Calvert County Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Mutual ElementaryPort Republic | Pre-K–5 | 374 | Public | 1.8 mi |
| St Leonard ElementarySt Leonard | Pre-K–5 | 401 | Public | 1.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Long Beach and Calvert Beach.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.