ZIP codes in Austin County
14 ZIPs touch Austin County, Texas. The blue dashed line is the county border; orange ZIPs reach into it.
14
ZIP codes
9
cross the county line
71,779
people in these ZIPs
254
counties in TX
Most people
Austin County ZIP list
More counties in Texas
- Andrews County1
- Angelina County9
- Aransas County6
- Archer County10
- Armstrong County6
- Atascosa County16
- Bailey County6
- Bandera County7
- Bastrop County15
- Baylor County2
- Bee County11
- Bell County29
Questions people actually ask
How many ZIP codes are in Austin County, Texas?
14 ZIP codes reach into Austin County, including 1 PO Box or single-address ZIPs placed by the town they serve. 9 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Austin County has the most people?
77833 (Brenham) has about 29,498 residents, the most of any ZIP touching Austin County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Austin 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 Austin 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