| Official Name: | Barnhill, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Wayne |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 397 |
| Coordinates: | 38.2844°N -88.3642°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 62809[1] |
| Area Code: | 618 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 403921 |
Barnhill is an unincorporated community in Wayne County, Illinois, United States. Barnhill is west of U.S. Route 45 and north of Mill Shoals. Barnhill had a post office, which closed on March 5, 2005.[2]