ZIP code · Colora · Maryland · United States
ZIP code 21917 — Colora
ZIP code 21917 serves Colora, Maryland.
- Postal code
- 21917Single source Value from one source, not cross-checked.
- City
- Colora
- County
- Cecil FIPS 24015
- State
- Maryland
- Country
- United States
- Coordinates
- 39.6695, -76.0934 — precision precise (locality)
View on OpenStreetMap - Population
- 1,786 (ZCTA, ACS 5-year)
- Population density
- 228 / sq mi
- Land area
- 7.8 sq mi (20.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $104,583
- Per-capita income
- $48,213
- Median age
- 52.1
- Households
- 692
- Housing units
- 692
- Median home value
- $362,200
- 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 21917 with another ZIP · ZIPs within 25 miles · distance from 21917
Map of ZIP code 21917
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 40 | 43 | 51 | 64 | 74 | 83 | 88 | 85 | 79 | 67 | 55 | 45 |
| Avg low °F | 25 | 26 | 34 | 44 | 54 | 64 | 69 | 67 | 60 | 48 | 37 | 31 |
| Precip in | 3.6 | 2.6 | 4.2 | 3.4 | 3.9 | 4.5 | 4.7 | 4.5 | 5.0 | 4.5 | 3.2 | 4.0 |
NOAA 1991–2020 climate normals from the nearest station: CONOWINGO DAM (4.5 mi) · NOAA NCEI
Places in ZIP 21917
- 1 schools
- 1 parks
- 1 post offices
- 4 places of worship
- 1 banks
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