ZIP code · Middle River · Maryland · United States
ZIP code 21220 — Middle River
ZIP code 21220 serves Middle River, Maryland.
- Postal code
- 21220Single source Value from one source, not cross-checked.
- City
- Middle River
- County
- Baltimore FIPS 24005
- State
- Maryland
- Country
- United States
- Coordinates
- 39.3401, -76.4153 — precision precise (locality)
View on OpenStreetMap - Population
- 42,936 (ZCTA, ACS 5-year)
- Population density
- 2,027 / sq mi
- Land area
- 21.2 sq mi (54.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $79,676
- Per-capita income
- $40,691
- Median age
- 38
- Households
- 16,220
- Housing units
- 17,960
- Median home value
- $279,900
- Median gross rent
- $1,621 / month
- Congressional districts
- MD-2 (also MD-1) (119th Congress)
- USDA hardiness zone
- 8a (10 to 15 °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 21220 with another ZIP · ZIPs within 25 miles · distance from 21220
Map of ZIP code 21220
Climate — monthly normals
Warmest month Jul (avg high 90°F), coldest Jan (avg low 30°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 47 | 55 | 67 | 76 | 85 | 90 | 87 | 80 | 69 | 58 | 48 |
| Avg low °F | 30 | 32 | 39 | 48 | 58 | 68 | 73 | 71 | 65 | 53 | 43 | 35 |
| Precip in | 3.1 | 2.8 | 3.9 | 3.5 | 3.4 | 3.4 | 4.7 | 4.3 | 4.5 | 3.5 | 3.0 | 3.7 |
NOAA 1991–2020 climate normals from the nearest station: MD SCI CTR BALTIMORE (11.1 mi) · NOAA NCEI
Places in ZIP 21220
- 10 schools
- 3 hospitals & clinics
- 7 doctors & dentists
- 2 pharmacies
- 2 supermarkets
- 54 restaurants & cafés
- 12 bars & pubs
- 28 parks
- 40 playgrounds
- 5 gyms & sports centres
- 3 post offices
- 27 places of worship
- 3 banks
- 17 gas stations
- 4 EV charging stations
- 5 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