| Otay River | |
|---|---|
 The river as it flows at the northern extreme of Imperial Beach, California | |
 | |
| Location | |
| Country | United States |
| State | California |
| Region | San Diego County |
| Physical characteristics | |
| Source | Outlet of Lower Otay Reservoir |
| • location | Otay County Open Space Preserve |
| • coordinates | 32°36′39″N 117°06′59″W / 32.61083°N 117.11639°W |
| • elevation | 392 ft (119 m) |
| Mouth | San Diego Bay |
• location | Imperial Beach |
• coordinates | 32°36′23″N 116°55′29″W / 32.60639°N 116.92472°W |
• elevation | 0 ft (0 m) |
| Length | 25 mi (40 km) |
| Basin size | 160 sq mi (410 km2) |
| Basin features | |
| Tributaries | |
| • left | Jamul Creek |
The Otay River (/ˈoʊtaɪ/) is a river in southern San Diego County, California. The 25 mi (40 km) river begins at San Miguel Mountain, flows through the Upper and Lower Otay Reservoirs, and continues on between the southern part of the Chula Vista and the Otay Mesa West district of San Diego, to its river mouth on San Diego Bay.