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Harford ZIP Codes — Maryland (MD)
| City or Location | County or District | States or Territories | States or Territories Abbrieviation | ZIP Code or Postcode |
|---|---|---|---|---|
| Aberdeen | Harford | Maryland | MD | 21001 |
| Aberdeen Proving Ground | Harford | Maryland | MD | 21005 |
| Abingdon | Harford | Maryland | MD | 21009 |
| Gunpowder | Harford | Maryland | MD | 21010 |
| Bel Air | Harford | Maryland | MD | 21014 |
| Bel Air | Harford | Maryland | MD | 21015 |
| Belcamp | Harford | Maryland | MD | 21017 |
| Benson | Harford | Maryland | MD | 21018 |
| Churchville | Harford | Maryland | MD | 21028 |
| Darlington | Harford | Maryland | MD | 21034 |
| Edgewood | Harford | Maryland | MD | 21040 |
| Fallston | Harford | Maryland | MD | 21047 |
| Forest Hill | Harford | Maryland | MD | 21050 |
| Havre De Grace | Harford | Maryland | MD | 21078 |
| Jarrettsville | Harford | Maryland | MD | 21084 |
| Joppa | Harford | Maryland | MD | 21085 |
| Perryman | Harford | Maryland | MD | 21130 |
| Pylesville | Harford | Maryland | MD | 21132 |
| Street | Harford | Maryland | MD | 21154 |
| Whiteford | Harford | Maryland | MD | 21160 |
| White Hall | Harford | Maryland | MD | 21161 |
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