Duncan Oklahoma ZIP Codes
Duncan holds 3 ZIP codes, all inside one county and one postal prefix.
Every ZIP code in Duncan
| ZIP code | County |
|---|---|
| 73533 | Stephens County |
| 73534 | Stephens County |
| 73536 | Stephens County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Duncan codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Duncan. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Duncan ZIP code begins 735. Those first three digits identify the sectional center facility that processes mail for this part of Oklahoma. Statewide that range covers 55 ZIP codes, so Duncan accounts for 5% of it.
Every Oklahoma ZIP prefix and the region it covers →
Area codes covering Duncan
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Duncan occupies.
Duncan Oklahoma area codes in full →
Where Duncan's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Duncan
| City | Distance | ZIP codes |
|---|---|---|
| Comanche Oklahoma ZIP codes | 8.3 mi | 1 ZIP code |
| Marlow Oklahoma ZIP codes | 10 mi | 1 ZIP code |
| Addington Oklahoma ZIP codes | 17 mi | 1 ZIP code |
| Velma Oklahoma ZIP codes | 17 mi | 1 ZIP code |
| Loco Oklahoma ZIP codes | 19 mi | 1 ZIP code |
| Hastings Oklahoma ZIP codes | 20 mi | 1 ZIP code |
| Rush Springs Oklahoma ZIP codes | 21 mi | 1 ZIP code |
| Waurika Oklahoma ZIP codes | 21 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.