| Official Name: | Posey, 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: | Clinton |
| Population Total: | 65[1] |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 456 |
| Coordinates: | 38.5369°N -89.3525°W |
| Area Code: | 618 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 416055 |
Posey is an unincorporated community in Clinton County, Illinois, United States. Posey is near the intersection of Illinois Route 127 and Illinois Route 161 6miles east of Bartelso.
G. R. Beckmeyer (1920 - 1977), Illinois businessman and politician, was born in Posey.[2]