County ZIP codes · Oklahoma · FIPS 40115
Ottawa County, OK ZIP Codes
Ottawa County, Oklahoma has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 2 for PO boxes or a single organization. 7 of the residential ones lie mainly in Ottawa County and 3 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $34,970 in 74339 (Commerce) to $61,272 in 74331 (Afton) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Ottawa County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $47,829 and $55,524.
They carry 10 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Ottawa County
7 ZIP codes lie mainly in Ottawa County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 74354 | Miami | 17,208 | 93 | $51k | $128k | 97% |
| 74370 | Wyandotte | 3,656 | 34 | $53k | $154k | 93% |
| 74343 | Fairland | 3,183 | 50 | $48k | $163k | 100% |
| 74363 | Quapaw | 2,492 | 38 | $56k | $114k | 100% |
| 74339 | Commerce | 2,245 | 657 | $35k | $73k | 100% |
| 74358 | North Miami | 222 | 1,657 | $50k | $59k | 100% |
| 74360 | Picher | 6 | 1 | – | – | 100% |
Partly in Ottawa County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
5 ZIP codes of Ottawa County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Ottawa | Elsewhere |
|---|---|---|
| 74354 | 97% | Craig County 3% |
| 74344 | 3% | Delaware County 97% |
| 74331 | 33% | Delaware County 51%; Craig County 17% |
| 74370 | 93% | Delaware County 7% |
| 74333 | 12% | Craig County 88% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 74335 | Cardin |
| 74355 | Miami |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Ottawa County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Ottawa County starts with 743.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 743 | Tulsa, OK (SCF 740) | 12 | 34 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.