ZIP codes in Twin Falls County
11 ZIPs touch Twin Falls County, Idaho. The blue dashed line is the county border; orange ZIPs reach into it.
11
ZIP codes
6
cross the county line
97,116
people in these ZIPs
44
counties in ID
Most people
Twin Falls County ZIP list
More counties in Idaho
- Oneida County4
- Owyhee County10
- Payette County6
- Power County4
- Shoshone County15
- Teton County5
- Valley County7
- Washington County5
Questions people actually ask
How many ZIP codes are in Twin Falls County, Idaho?
11 ZIP codes reach into Twin Falls 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 Twin Falls County has the most people?
83301 (Twin Falls) has about 63,592 residents, the most of any ZIP touching Twin Falls County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Twin Falls 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 Twin Falls 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