ZIP code · Baltimore · Maryland · United States
ZIP code 21251 — Baltimore
ZIP code 21251 serves Baltimore, Maryland.
- Postal code
- 21251Single source Value from one source, not cross-checked.
- City
- Baltimore
- County
- Baltimore FIPS 24510
- State
- Maryland
- Country
- United States
- Coordinates
- 39.4390, -76.5921 — precision estimated (postal-area centroid)
View on OpenStreetMap - Population
- 249 (ZCTA, ACS 5-year)
- Population density
- 2,080 / sq mi
- Land area
- 0.1 sq mi (0.3 km²) (ZCTA, ACS 5-year)
- Per-capita income
- $13,550
- Median age
- 20.1
- Households
- 0
- Housing units
- 0
- Congressional district
- MD-7 (119th Congress)
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 21251 with another ZIP · ZIPs within 25 miles · distance from 21251
Map of ZIP code 21251
Climate — monthly normals
Warmest month Jul (avg high 87°F), coldest Jan (avg low 27°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 42 | 46 | 54 | 66 | 73 | 82 | 87 | 84 | 77 | 66 | 56 | 46 |
| Avg low °F | 27 | 28 | 34 | 45 | 55 | 64 | 69 | 67 | 60 | 49 | 39 | 32 |
NOAA 1991–2020 climate normals from the nearest station: CYLBURN (6.8 mi) · NOAA NCEI
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. Data generated on 2026-08-21. Methodology · Report an error on this page