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ZIP codes in Millard County

12 ZIPs touch Millard County, Utah. The blue dashed line is the county border; orange ZIPs reach into it.

12

ZIP codes

1

cross the county line

15,211

people in these ZIPs

29

counties in UT

Most people

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Millard County ZIP list

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Questions people actually ask

How many ZIP codes are in Millard County, Utah?

12 ZIP codes reach into Millard County. 1 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Millard County has the most people?

84624 (Delta) has about 5,948 residents, the most of any ZIP touching Millard County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Millard 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 Millard 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