Fort Sill ZIP code, Oklahoma
The ZIP code for Fort Sill, OK is 73503, and its area code is 580.
- USPS city name
- 1 ZIP code
- Population
- 11,468
- Area code
- 580
- County
- Comanche County
- State
- Oklahoma
NANPA lists no telephone rate centre for Fort Sill itself, so these are the area codes of the nearest one, Lawton (3.3 miles). A town on an area-code boundary can differ from its neighbour.
Fort Sill in numbers
About 11,468 people live in Fort Sill, in 1,755 households. The median household income is $60,859 a year, 6% below the Oklahoma median of $65,039 (US: $80,734).
| Population | 11,468 |
|---|---|
| Households | 1,755 |
| Median household income | $60,859 |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Fort Sill. Survey estimates carry margins of error, wider for small places. Sources and methods.
ZIP codes addressed as Fort Sill
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
73503 | Fort Sill , OK | Standard | 11,468 | $60,859 | — |
Map of Fort Sill ZIP codes
The ZIP codes of Fort Sill, OK, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Fort Sill
The nearest larger towns are Lawton (90,595 people, 6.1 mi), Duncan (22,958 people, 33 mi) and Chickasha (16,539 people, 40 mi).
| Town | Population | Distance |
|---|---|---|
| Lawton | 90,595 | 6.1 mi |
| Cache | 3,074 | 8.2 mi |
| Elgin | 3,608 | 13.2 mi |
| Anadarko | 5,572 | 29.9 mi |
More nearby: every ZIP code in Comanche County · Oklahoma ZIP codes
Cite this page
zipcodes.pro. “Fort Sill, OK ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ok/fort-sill
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