| Zip Code | City | Population ↓ |
|---|---|---|
| 73703 | Enid | 30,556 |
| 73701 | Enid | 24,476 |
| 73773 | Waukomis | 1,623 |
| 73754 | Lahoma | 1,043 |
| 73738 | Garber | 1,012 |
| 73735 | Drummond | 623 |
| 73730 | Covington | 598 |
| 73056 | Marshall | 455 |
| 73736 | Fairmont | 424 |
| 73753 | Kremlin | 378 |
| 73705 | Enid | 359 |
| 74640 | Hunter | 327 |
| 73720 | Bison | 221 |
| 73733 | Douglas | 221 |
| 73727 | Carrier | 152 |
| 73743 | Hillsdale | 89 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 16 ZCTAs in Garfield County, Oklahoma (US Census).