Postal reference
ZIP 21778, Maryland
ZIP code 21778 is associated with Rocky Ridge in Maryland in the GeoNames postal reference.
Reference details
- State
- Maryland (MD)
- ZIP code
- 21778
- Associated localities
- Rocky Ridge
- County names in postal records
- Frederick
- Approximate postal point
- 39.6057, -77.3296
View point on map ↗
Postal information is adapted from GeoNames, CC BY 4.0. Locality associations and coordinates are approximate, not ZIP boundaries or a guarantee of current mail delivery.