| Official Name: | Mill Iron, Montana |
| Pushpin Map: | Montana#USA |
| Pushpin Label: | Mill Iron |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Montana |
| Subdivision Type2: | County |
| Subdivision Name2: | Carter |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 3110 |
| Coordinates: | 45.8536°N -104.2194°W |
| Area Code: | 406 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 774229 |
Mill Iron is an unincorporated community in Carter County, Montana, United States. Mill Iron is east of Ekalaka. The community had its own post office until January 1, 1994.[1] [2]