ZIP code · Elk Mills · Maryland · United States
ZIP code 21920 — Elk Mills
ZIP code 21920 serves Elk Mills, Maryland.
- Postal code
- 21920Single source Value from one source, not cross-checked.
- City
- Elk Mills
- County
- Cecil FIPS 24015
- State
- Maryland
- Country
- United States
- Coordinates
- 39.6580, -75.8282 — precision precise (locality)
View on OpenStreetMap - Population
- 1,153 (ZCTA, ACS 5-year)
- Population density
- 1,167 / sq mi
- Land area
- 1 sq mi (2.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $119,156
- Per-capita income
- $33,102
- Median age
- 42.2
- Households
- 352
- Housing units
- 352
- Median home value
- $338,600
- Congressional district
- MD-1 (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 21920 with another ZIP · ZIPs within 25 miles · distance from 21920
Map of ZIP code 21920
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 | 54 | 67 | 76 | 84 | 89 | 87 | 79 | 69 | 57 | 47 |
| Avg low °F | 25 | 25 | 33 | 42 | 52 | 62 | 66 | 65 | 58 | 46 | 36 | 30 |
| Precip in | 3.4 | 2.9 | 4.3 | 3.7 | 3.6 | 4.0 | 4.8 | 4.0 | 4.9 | 4.0 | 3.4 | 4.0 |
NOAA 1991–2020 climate normals from the nearest station: NEWARK AG FARM (4.5 mi) · NOAA NCEI
Places in ZIP 21920
- 1 parks
- 1 playgrounds
- 1 post offices
- 2 places of worship
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