Harper County, Oklahoma ZIP codes
2 ZIP codes are in Harper County, plus 5 that cross in from neighboring counties.
- ZIP codes
- 2
- Population in these ZIPs
- 1,797
- Avg. median income
- $71,200population-weighted
- Cities & towns
- 2
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ZIP codes in Harper County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 73834 | Buffalo | 1,544 | $72,500 | $54,900 |
| 73855 | Rosston | 253 | $63,333 | $185,700 |
ZIP codes partly in Harper County
These ZIP codes are mostly in a neighboring county but cover part of Harper County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 73801 | Woodward | Woodward County | 14,892 | $58,877 | $131,300 |
| 73842 | Freedom | Woods County | 354 | — | $148,500 |
| 73844 | Gate | Beaver County | 297 | — | $84,900 |
| 73848 | Laverne | Beaver County | 1,555 | $57,619 | $103,600 |
| 73851 | May | Ellis County | 111 | $60,662 | $57,300 |
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 and towns in Harper County
Nearby counties
Frequently asked questions
How many ZIP codes are in Harper County, Oklahoma?
2 ZIP codes are mainly in Harper County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Harper County?
ZIP codes in Harper County use the city names Buffalo and Rosston.