ZIP codes in Iron County
9 ZIPs touch Iron County, Michigan. The blue dashed line is the county border; orange ZIPs reach into it.
9
ZIP codes
2
cross the county line
13,050
people in these ZIPs
83
counties in MI
Most people
Iron County ZIP list
More counties in Michigan
- Hillsdale County22
- Houghton County20
- Huron County18
- Ingham County39
- Ionia County22
- Iosco County13
- Isabella County17
- Jackson County30
- Kalamazoo County31
- Kalkaska County8
- Kent County60
- Keweenaw County6
Questions people actually ask
How many ZIP codes are in Iron County, Michigan?
9 ZIP codes reach into Iron 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 Iron County has the most people?
49935 (Iron River) has about 5,841 residents, the most of any ZIP touching Iron County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Iron 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 Iron 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.
Keep exploring
Updated 2026-11-10 · Where the data comes from