| Leaf River | |
|---|---|
| Physical characteristics | |
| Source | |
| • location | Carroll County southeast of Shannon, Illinois |
| • coordinates | 42°07′46″N 89°41′59″W / 42.1294444°N 89.6997222°W |
| Mouth | |
• location | Confluence with the Rock River north of Oregon, Illinois |
• coordinates | 42°05′50″N 89°19′20″W / 42.0972222°N 89.3222222°W |
• elevation | 676 ft (206 m) |
| Length | 31 mi (50 km) |
| Basin features | |
| Progression | Leaf River → Rock → Mississippi → Gulf of Mexico |
| GNIS ID | 411890 |
The Leaf River is a tributary of the Rock River, about 31 miles (50 km) long,[1] in northwestern Illinois in the United States.[2] Via the Rock, it is part of the Mississippi River watershed.