| Furnace, Kentucky | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Kentucky#USA |
| Pushpin Label: | Furnace |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location within the state of Kentucky |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kentucky |
| Subdivision Type2: | County |
| Subdivision Name2: | Estill |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1257 |
| Coordinates: | 37.7619°N -83.8317°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 512266 |
Furnace is an unincorporated community located in Estill County, Kentucky, United States.
Settlers found the surrounding area rich in iron ore.[1] The Estill Steam Furnace, a blast furnace was established in about 1830.
A post office was established in the community in 1857, and named for the Estill Steam Furnace. This was shortened to Furnace in 1882.[2] The post office was discontinued in 1975.[3]