| Official Name: | Duncan, Kentucky |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Kentucky |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kentucky |
| Subdivision Type2: | County |
| Subdivision Name2: | Casey |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1329 |
| Coordinates: | 37.3586°N -84.7275°W |
| Area Code: | 606 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 507889 |
Duncan is an unincorporated community in Casey County, Kentucky, United States. Duncan is located at the junction of Kentucky Route 501 and Kentucky Route 837 12miles east-northeast of Liberty.[1]