ZIP codes in Summit County
9 ZIPs touch Summit County, Utah. The blue dashed line is the county border; orange ZIPs reach into it.
9
ZIP codes
2
cross the county line
45,832
people in these ZIPs
29
counties in UT
Most people
Summit County ZIP list
More counties in Utah
- Piute County7
- Rich County4
- Salt Lake County72
- San Juan County10
- Sanpete County15
- Sevier County12
- Tooele County8
- Uintah County12
- Utah County29
- Wasatch County6
- Washington County23
- Wayne County6
Questions people actually ask
How many ZIP codes are in Summit County, Utah?
9 ZIP codes reach into Summit County, including 1 PO Box or single-address ZIPs placed by the town they serve. 2 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Summit County has the most people?
84098 (Park City) has about 20,357 residents, the most of any ZIP touching Summit County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Summit 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 Summit 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