County ZIP codes · Oklahoma · FIPS 40041
Delaware County, OK ZIP Codes
Delaware County, Oklahoma has 14 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 13 residential and 1 for PO boxes or a single organization. 9 of the residential ones lie mainly in Delaware County and 4 mainly in a neighboring county; 10 cross the county line. Median household income ranges from $47,250 in 74964 (Watts) to $61,272 in 74331 (Afton) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Delaware 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 $47,526 and $57,768.
They carry 13 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 13 residential ZIP codes in Delaware County
9 ZIP codes lie mainly in Delaware County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 74344 | Grove | 14,876 | 166 | $58k | $221k | 97% |
| 74346 | Jay | 8,266 | 36 | $50k | $130k | 100% |
| 74331 | Afton | 7,058 | 57 | $61k | $205k | 51% |
| 74338 | Colcord | 5,069 | 36 | $58k | $121k | 100% |
| 74347 | Kansas | 2,757 | 53 | $48k | $104k | 80% |
| 74342 | Eucha | 2,039 | 27 | $57k | $161k | 97% |
| 74364 | Rose | 1,931 | 20 | $64k | $171k | 66% |
| 74359 | Oaks | 309 | 141 | $46k | $59k | 95% |
| 74368 | Twin Oaks | 60 | 57 | $92k | $325k | 100% |
Partly in Delaware 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?
10 ZIP codes of Delaware County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Delaware | Elsewhere |
|---|---|---|
| 74344 | 97% | Ottawa County 3% |
| 74331 | 51% | Ottawa County 33%; Craig County 17% |
| 74365 | 27% | Mayes County 73% |
| 74370 | 7% | Ottawa County 93% |
| 74347 | 80% | Adair County 13%; Cherokee County 8% |
| 74964 | 6% | Adair County 93% |
| 74342 | 97% | Mayes County 3% |
| 74364 | 66% | Cherokee County 21%; Mayes County 13% |
| 74366 | 10% | Mayes County 90% |
| 74359 | 95% | Cherokee County 5% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 74345 | Grove |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Delaware County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Delaware County's ZIP codes use 2 prefixes: 743 and 749.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.