| Grays Knob, Kentucky | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Kentucky#USA |
| Pushpin Label: | Grays Knob |
| 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 |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CST |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1299 |
| Coordinates: | 36.8067°N -83.31°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 40829 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 493217 |
Grays Knob is an unincorporated community and coal town in Harlan County, Kentucky, United States.
A post office was established in the community in 1916, and named for a local hill.[1] It is located just south of the city of Harlan.