Iron County, MI ZIP codes
There are 7 ZIP codes in Iron County, MI, in 7 towns, from 49902 to 49964. The largest are 49935 (Iron River), 49920 (Crystal Falls) and 49927 (Gaastra). 2 more cross into it from neighbouring counties: 49879 and 49967.
The county seat is Crystal Falls.
- ZIP codes
- 7
- Partly in it
- 2 more
- Towns
- 7
- County seat
- Crystal Falls
- County FIPS
26071- State
- Michigan
- Population
- 11,667
- Median household income
- $55,940
- Land area
- 1,166 sq mi
- Area code
- 906
Iron County ZIP codes by town
- Crystal Falls (county seat)
- 49920
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Iron County
These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Iron County.
- 49879 Republic · mostly in Marquette County
- 49967 Trout Creek · mostly in Houghton County
Map of Iron County ZIP codes
The ZIP codes of Iron County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Iron County in numbers
About 11,667 people live in Iron County, in 5,547 households, the 73rd most populous of Michigan's 83 counties. The median household income is $55,940 a year, 23% below the Michigan median of $72,875 (US: $80,734). The median owner-occupied home is valued at $109,100 (53% below the Michigan median), and median gross rent is $716 a month. The median age is 53.1; 22.5% of adults 25 and over hold a bachelor's degree or higher (32.4% across Michigan); the average commute takes 20 minutes.
| Population | 11,667 |
|---|---|
| Households | 5,547 |
| Median age | 53.1 |
| Median household income | $55,940 |
| Median home value | $109,100 |
| Median gross rent | $716 |
| Bachelor's degree or higher | 22.5% |
| Mean commute | 20.0 min |
| Population density | 10 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Iron County
| Town | ZIP codes | Population |
|---|---|---|
| Iron River | 1 | 3,002 |
| Crystal Falls | 1 | 1,719 |
| Caspian | 1 | 600 |
| Gaastra | 1 | 296 |
| Amasa | 1 | 253 |
| Alpha | 1 | 215 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Iron County.
Not sure you are in Iron County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Iron County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
49902 | Alpha , MI | Standard | 215 | $39,115 | $34,100 |
49903 | Amasa , MI | Standard | 233 | $41,818 | $85,600 |
49915 | Caspian , MI | Standard | 570 | $35,000 | $79,100 |
49920 | Crystal Falls , MI | Standard | 4,380 | $63,605 | $129,500 |
49927 | Gaastra , MI | Standard | 371 | $47,500 | $53,800 |
49935 | Iron River , MI | Standard | 5,841 | $57,236 | $111,500 |
49964 | Stambaugh , MI | No street area | — | — | — |
Cite this page
zipcodes.pro. “Iron County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mi/county/iron
Underlying data is public domain or openly licensed — sources, vintages and licences.