| Official Name: | Coldiron, Kentucky |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Kentucky#USA |
| Pushpin Label: | Coldiron |
| Pushpin Label Position: | top |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kentucky |
| Subdivision Type2: | County |
| Subdivision Name2: | Harlan |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.63 |
| Area Land Km2: | 0.57 |
| Area Water Km2: | 0.07 |
| Area Total Sq Mi: | 0.24 |
| Area Land Sq Mi: | 0.22 |
| Area Water Sq Mi: | 0.03 |
| Population As Of: | 2020 |
| Population Total: | 222 |
| Population Density Km2: | 392.78 |
| Population Density Sq Mi: | 1018.35 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1132 |
| Coordinates: | 36.8267°N -83.4536°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 40819[2] |
| Area Code: | 606 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 489796 |
Coldiron is a census-designated place and unincorporated community in Harlan County, Kentucky, United States. Its population was 222 as of the 2020 census.