ZIP codes in Elmore County
9 ZIPs touch Elmore County, Idaho. The blue dashed line is the county border; orange ZIPs reach into it.
9
ZIP codes
5
cross the county line
51,549
people in these ZIPs
44
counties in ID
Most people
Elmore County ZIP list
More counties in Idaho
- Canyon County17
- Caribou County6
- Cassia County9
- Clark County4
- Clearwater County7
- Custer County7
- Franklin County7
- Fremont County11
- Gem County7
- Gooding County6
- Idaho County16
- Jefferson County10
Questions people actually ask
How many ZIP codes are in Elmore County, Idaho?
9 ZIP codes reach into Elmore County, including 1 PO Box or single-address ZIPs placed by the town they serve. 5 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Elmore County has the most people?
83647 (Mountain Home) has about 22,952 residents, the most of any ZIP touching Elmore County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Elmore 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 Elmore 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