Fort Sill zipcode
| City | Fort Sill |
| ZIP Code | 73503 |
| Type | Standard |
| State Code | OK |
| State | Oklahoma |
ZIP code of Fort Sill is 73503. This place is located in Oklahoma state in US. To send any postal service to Fort Sill, you must use 73503 zipcode.
The ZIP code 73503 is also used with 1 more city name of Oklahoma.
- Lawton, OK