Duncan, OK ZIP codes
Duncan, Oklahoma has 3 ZIP codes, including 2 PO Box ZIPs. They are in Stephens County.
- Population in these ZIPs
- 27,618
- Avg. median income
- $59,900population-weighted
- Typical home value
- $134,100population-weighted
- Metro area
- Duncan, OK
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Duncan, OK ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 73533 | Stephens County | 27,618 | $59,906 | $134,100 |
| 73534 PO Box | Stephens County | — | — | — |
| 73536 PO Box | Stephens County | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Duncan
- Marlow 10 mi
- Comanche 12 mi
- Velma 14 mi
- Addington 17 mi
- Loco 17 mi
- Countyline 19 mi
- Rush Springs 19 mi
- Tussy 20 mi
- Foster 20 mi
- Ratliff City 22 mi
- Sterling 23 mi
- Hastings 24 mi
Frequently asked questions
What county is Duncan, Oklahoma in?
Duncan ZIP codes are in Stephens County.
Which Duncan ZIP codes are PO Boxes?
73534 and 73536 are PO Box or single-organization ZIP codes; they have no residential delivery area.