Arnold, MD
ZIP Codes in Arnold, Maryland
January 10, 2026
| ZIP Code | Population | Coordinates |
|---|---|---|
| 21012 | 23,144 | 39.0466, -76.4956 |
Arnold has 1 ZIP code
ZIP Codes in Arnold, Maryland
January 10, 2026
| ZIP Code | Population | Coordinates |
|---|---|---|
| 21012 | 23,144 | 39.0466, -76.4956 |