| Turkey River | |
| Map: | Turkey river wp.svg |
| Subdivision Type1: | Country |
| Subdivision Name1: | US |
| Subdivision Type2: | State |
| Subdivision Name2: | Iowa |
| Subdivision Type4: | District |
| Subdivision Name4: | Clayton County, Iowa, Fayette County, Iowa, Winneshiek County, Iowa, Howard County, Iowa |
| Discharge1 Location: | Garber, Iowa [1] |
| Discharge1 Avg: | 1,108 cu/ft. per sec. |
| Source1 Coordinates: | 43.342°N -92.311°W |
| Mouth: | Mississippi River |
| Mouth Coordinates: | 42.7175°N -91.0119°W |
| Mouth Elevation: | 607feet |
| Tributaries Left: | Roberts Creek |
| Tributaries Right: | Volga River, Little Turkey River |
The Turkey River is a 153adj=midNaNadj=mid[2] tributary of the upper Mississippi River. Its main branch rises in Howard County, Iowa, near the city of Cresco. The other counties it or its tributaries cover are Chickasaw, Winneshiek, Fayette, Clayton, Delaware, and Dubuque. Tributaries include the Little Turkey River and Crane Creek.
Flowing from northwest to southeast, it flows through or near the cities of Spillville, Fort Atkinson, Eldorado (where it joins with the Little Turkey River), Clermont, Elgin, Elkader, Elkport, Garber, and Millville, before entering the Mississippi south of Guttenberg and across from Cassville, Wisconsin. At its mouth is the community of Turkey River, Iowa, which is named after the river.
The watershed covers 1083200acres.