ZIP code · Saint James · Maryland · United States
ZIP code 21781 — Saint James
ZIP code 21781 serves Saint James, Maryland.
- Postal code
- 21781Single source Value from one source, not cross-checked.
- City
- Saint James
- County
- Washington FIPS 24043
- State
- Maryland
- Country
- United States
- Coordinates
- 39.5699, -77.7607 — precision precise (locality)
View on OpenStreetMap - Population
- 34 (ZCTA, ACS 5-year)
- Population density
- 142 / sq mi
- Land area
- 0.2 sq mi (0.6 km²) (ZCTA, ACS 5-year)
- Per-capita income
- $4,412
- Median age
- 18.8
- Households
- 0
- Housing units
- 0
- Congressional district
- MD-6 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 21781 with another ZIP · ZIPs within 25 miles · distance from 21781
Map of ZIP code 21781
Climate — monthly normals
Warmest month Jul (avg high 86°F), coldest Jan (avg low 22°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 40 | 44 | 53 | 65 | 74 | 83 | 86 | 85 | 78 | 66 | 54 | 44 |
| Avg low °F | 22 | 25 | 32 | 41 | 53 | 62 | 66 | 65 | 56 | 45 | 34 | 27 |
| Precip in | 3.2 | 2.7 | 3.9 | 3.9 | 4.3 | 3.4 | 3.7 | 3.7 | 4.8 | 3.4 | 2.9 | 3.7 |
NOAA 1991–2020 climate normals from the nearest station: HAGERSTOWN 1 E (5.9 mi) · NOAA NCEI
Places in ZIP 21781
- 2 schools
- 1 gyms & sports centres
- 1 libraries
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page