ZIP codes in St. Clair County
19 ZIPs touch St. Clair County, Alabama. The blue dashed line is the county border; orange ZIPs reach into it.
19
ZIP codes
8
cross the county line
155,758
people in these ZIPs
67
counties in AL
Most people
St. Clair County ZIP list
More counties in Alabama
- Perry County9
- Pickens County9
- Pike County10
- Randolph County8
- Russell County15
- Shelby County26
- Sumter County11
- Talladega County13
- Tallapoosa County14
- Tuscaloosa County37
- Walker County21
- Washington County16
Questions people actually ask
How many ZIP codes are in St. Clair County, Alabama?
19 ZIP codes reach into St. Clair 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 St. Clair County has the most people?
35173 (Trussville) has about 31,603 residents, the most of any ZIP touching St. Clair County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in St. Clair 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 St. Clair 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