| Official Name: | Wendelin, 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: | Clay |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 472 |
| Coordinates: | 38.8333°N -88.2728°W |
| Area Code: | 618 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 420746[1] |
Wendelin is an unincorporated community in Clay County, Illinois, United States. Wendelin is northeast of Sailor Springs. Wendelin is home of Holy Cross Catholic Church, and Vic's Tavern.