ZIP code · Ridgely · Maryland · United States
ZIP code 21660 — Ridgely
ZIP code 21660 serves Ridgely, Maryland.
- Postal code
- 21660Single source Value from one source, not cross-checked.
- City
- Ridgely
- County
- Caroline FIPS 24011
- State
- Maryland
- Country
- United States
- Coordinates
- 38.9568, -75.8848 — precision precise (locality)
View on OpenStreetMap - Population
- 4,244 (ZCTA, ACS 5-year)
- Population density
- 130 / sq mi
- Land area
- 32.7 sq mi (84.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $76,917
- Per-capita income
- $33,838
- Median age
- 35.6
- Households
- 1,497
- Housing units
- 1,571
- Median home value
- $322,500
- Median gross rent
- $1,008 / month
- Congressional district
- MD-1 (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 21660 with another ZIP · ZIPs within 25 miles · distance from 21660
Map of ZIP code 21660
Climate — monthly normals
Warmest month Jul (avg high 87°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 46 | 54 | 65 | 73 | 82 | 87 | 85 | 79 | 68 | 57 | 48 |
| Avg low °F | 25 | 26 | 33 | 42 | 52 | 62 | 67 | 65 | 58 | 46 | 37 | 29 |
| Precip in | 3.6 | 2.9 | 4.0 | 3.4 | 3.7 | 4.2 | 4.0 | 4.5 | 4.8 | 4.2 | 3.2 | 3.8 |
NOAA 1991–2020 climate normals from the nearest station: GREENWOOD 2NE (19.3 mi) · NOAA NCEI
Places in ZIP 21660
- 3 schools
- 1 bars & pubs
- 5 parks
- 11 playgrounds
- 1 post offices
- 6 places of worship
- 2 banks
- 2 gas stations
- 2 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