| Laguna Diversion Dam | |
|---|---|
 Overhead of dam facing north | |
  Location of Laguna Diversion Dam in California | |
| Location | Imperial County, California / Yuma County, Arizona, US |
| Coordinates | 32°49′22″N 114°29′39″W / 32.82278°N 114.49417°W |
| Construction began | 1903 |
| Opening date | 1905 |
| Owner(s) | U.S. Bureau of Reclamation |
| Operator(s) | Imperial Irrigation District |
| Dam and spillways | |
| Type of dam | Rock-fill weir, concrete surface |
| Impounds | Colorado River |
| Height | 43 feet (13 m) |
| Length | 4,780 feet (1,460 m) |
| Spillway type | Controlled service |
The Laguna Diversion Dam is a rock-filled diversion dam on the Colorado River. It is located 13 miles (21 km) northeast of Winterhaven, CA–Yuma, AZ on Imperial County route S24. Constructed between 1903 and 1905, the dam was the first dam built on the Colorado River and subsequently ended boat travel to the north.