ZIP code · Baltimore · Maryland · United States
ZIP code 21240 — Baltimore
ZIP code 21240 serves Baltimore, Maryland.
- Postal code
- 21240Single source Value from one source, not cross-checked.
- City
- Baltimore
- County
- Anne Arundel FIPS 24003
- State
- Maryland
- Country
- United States
- Coordinates
- 39.1753, -76.6732 — precision precise (locality)
View on OpenStreetMap - Population
- 0 (ZCTA, ACS 5-year)
- Population density
- 0 / sq mi
- Land area
- 4.5 sq mi (11.7 km²) (ZCTA, ACS 5-year)
- Households
- 0
- Housing units
- 0
- Congressional district
- MD-3 (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °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 21240 with another ZIP · ZIPs within 25 miles · distance from 21240
Map of ZIP code 21240
Climate — monthly normals
Warmest month Jul (avg high 89°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 46 | 55 | 67 | 76 | 84 | 89 | 87 | 80 | 68 | 57 | 48 |
| Avg low °F | 25 | 27 | 34 | 44 | 53 | 63 | 68 | 66 | 59 | 47 | 37 | 30 |
| Precip in | 3.1 | 2.9 | 4.0 | 3.4 | 3.9 | 4.0 | 4.5 | 4.1 | 4.4 | 3.9 | 3.1 | 3.7 |
NOAA 1991–2020 climate normals from the nearest station: BALTIMORE WASH INTL AP (0.8 mi) · NOAA NCEI
Places in ZIP 21240
- 42 restaurants & cafés
- 3 bars & pubs
- 1 gyms & sports centres
- 1 banks
- 3 gas stations
- 4 EV charging stations
- 3 police & fire stations
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