ZIP codes in Washington County
13 ZIPs touch Washington County, Oklahoma. The blue dashed line is the county border; orange ZIPs reach into it.
13
ZIP codes
8
cross the county line
101,757
people in these ZIPs
77
counties in OK
Most people
Washington County ZIP list
More counties in Oklahoma
- Sequoyah County9
- Stephens County12
- Texas County9
- Tillman County9
- Tulsa County66
- Wagoner County16
- Washita County18
- Woods County8
- Woodward County12
Questions people actually ask
How many ZIP codes are in Washington County, Oklahoma?
13 ZIP codes reach into Washington County, including 1 PO Box or single-address ZIPs placed by the town they serve. 8 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Washington County has the most people?
74006 (Bartlesville) has about 27,911 residents, the most of any ZIP touching Washington County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Washington County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Washington County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from