County ZIP codes · Oklahoma · FIPS 40071
Kay County, OK ZIP Codes
Kay County, Oklahoma has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 1 for PO boxes or a single organization. 7 of the residential ones lie mainly in Kay County and 3 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $52,067 in 74601 to $80,331 in 74604 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Kay 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 $53,964 and $63,145.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Kay County
7 ZIP codes lie mainly in Kay County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 74601 | Ponca City | 18,916 | 118 | $52k | $100k | 96% |
| 74631 | Blackwell | 6,689 | 65 | $54k | $87k | 100% |
| 74653 | Tonkawa | 3,710 | 33 | $59k | $88k | 90% |
| 74647 | Newkirk | 3,534 | 13 | $63k | $120k | 100% |
| 74632 | Braman | 553 | 5 | $89k | – | 100% |
| 74641 | Kaw City | 552 | 15 | $62k | $128k | 100% |
| 74646 | Nardin | 289 | 5 | $91k | – | 77% |
Partly in Kay 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?
6 ZIP codes of Kay County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Kay | Elsewhere |
|---|---|---|
| 74601 | 96% | Noble County 4% |
| 74604 | 50% | Osage County 50% |
| 74653 | 90% | Noble County 10% |
| 74652 | 9% | Osage County 91% |
| 74643 | 7% | Grant County 93% |
| 74646 | 77% | Grant County 23% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 74602 | Ponca City |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Kay 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 Kay County starts with 746.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 746 | Tulsa, OK (SCF 740) | 11 | 19 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.