Postal reference / United States
21904Port Deposit, Maryland
ZIP code 21904 is a United States postal code for Port Deposit, Maryland. Its county association is Cecil County. The map reference point is at 39.6151, -76.0633.
- State / territory
- Maryland
- Recorded place name
- Port Deposit
- County association
- Cecil
- Estimated coordinate
- 39.6151, -76.0633
View on OpenStreetMap - ZIP prefix
- 219 · 17 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 23.6 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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Browse the other 604 ZIP codes recorded for Maryland, sorted by code with place and county.
Maryland directoryNearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 21903 | Perryville | MD | Cecil | 3.5 |
| 21917 | Colora | MD | Cecil | 4.1 |
| 21902 | Perry Point | MD | Cecil | 4.3 |
| 21911 | Rising Sun | MD | Cecil | 5.1 |
| 21078 | Havre De Grace | MD | Harford | 5.2 |
| 21914 | Charlestown | MD | Cecil | 5.3 |
| 21901 | North East | MD | Cecil | 5.9 |
| 21918 | Conowingo | MD | Cecil | 6.6 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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