ZIP codes in San Patricio County
10 ZIPs touch San Patricio County, Texas. The blue dashed line is the county border; orange ZIPs reach into it.
10
ZIP codes
4
cross the county line
76,326
people in these ZIPs
254
counties in TX
Most people
San Patricio County ZIP list
More counties in Texas
- Rockwall County9
- Runnels County12
- Rusk County21
- Sabine County6
- San Augustine County4
- San Jacinto County8
- San Saba County8
- Schleicher County3
- Scurry County10
- Shackelford County5
- Shelby County7
- Sherman County4
Questions people actually ask
How many ZIP codes are in San Patricio County, Texas?
10 ZIP codes reach into San Patricio County, including 1 PO Box or single-address ZIPs placed by the town they serve. 4 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in San Patricio County has the most people?
78374 (Portland) has about 20,408 residents, the most of any ZIP touching San Patricio County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in San Patricio 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 San Patricio 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