ZIP codes in Caribou County
6 ZIPs touch Caribou County, Idaho. The blue dashed line is the county border; orange ZIPs reach into it.
6
ZIP codes
4
cross the county line
11,227
people in these ZIPs
44
counties in ID
Most people
Caribou County ZIP list
More counties in Idaho
- Bonner County19
- Bonneville County16
- Boundary County6
- Butte County3
- Camas County4
- Canyon County17
- Cassia County9
- Clark County4
- Clearwater County7
- Custer County7
- Elmore County9
- Franklin County7
Questions people actually ask
How many ZIP codes are in Caribou County, Idaho?
6 ZIP codes reach into Caribou 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 Caribou County has the most people?
83276 (Soda Springs) has about 4,155 residents, the most of any ZIP touching Caribou County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Caribou 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 Caribou 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