| Official Name: | Red Oak, 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: | Stephenson |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 791 |
| Coordinates: | 42.3922°N -89.6717°W |
| Postal Code Type: | Zip |
| Postal Code: | 61066 |
| Area Code: | 815 & 779 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 416454 |
Red Oak is an unincorporated community located along Richland Creek in Buckeye Township, Stephenson County, Illinois, United States.[1] Red Oak is in Orangeville Community School District.
Stephen A. Rigney (180 - 1947), Illinois state representative and farmer, was born near Red Oak.[2]