| Post Office | Ellicott City |
| Division | Howard |
| Pincode | 21043 |
| Post Office | Columbia |
| Division | Howard |
| Pincode | 21044 |
| Post Office | Ellicott City |
| Division | Howard |
| Pincode | 21042 |
| Post Office | Columbia |
| Division | Howard |
| Pincode | 21045 |
| Post Office | Laurel |
| Division | Howard |
| Pincode | 20723 |
| Post Office | Elkridge |
| Division | Howard |
| Pincode | 21075 |
| Post Office | Jessup |
| Division | Howard |
| Pincode | 20794 |
| Post Office | Columbia |
| Division | Howard |
| Pincode | 21046 |
| Post Office | Clarksville |
| Division | Howard |
| Pincode | 21029 |
21 City in Howard | List of Zip Codes Location In Maryland and Your selected County Howard