ZIP codes in Washington County
8 ZIPs touch Washington County, Texas. The blue dashed line is the county border; orange ZIPs reach into it.
8
ZIP codes
6
cross the county line
56,700
people in these ZIPs
254
counties in TX
Most people
Washington County ZIP list
More counties in Texas
- Val Verde County9
- Van Zandt County13
- Victoria County15
- Walker County15
- Waller County11
- Ward County6
- Webb County11
- Wharton County13
- Wheeler County7
- Wichita County13
- Wilbarger County7
- Willacy County6
Questions people actually ask
How many ZIP codes are in Washington County, Texas?
8 ZIP codes reach into Washington County, including 1 PO Box or single-address ZIPs placed by the town they serve. 6 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Washington County has the most people?
77833 (Brenham) has about 29,498 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