| Rough and Ready Island | |
| Image Alt: | Aerial image of an island. |
| Pushpin Map: | United States Sacramento Delta#USA California#USA |
| Coordinates: | 37.9508°N -121.3614°W |
| Location: | Northern California |
| Waterbody: | Sacramento–San Joaquin River Delta |
| Area Sqft: | or |
| Area Acre: | --> |
| Length Ft: | --> |
| Width Ft: | --> |
| Coastline Ft: | --> |
| Elevation Ft: | 0 |
| Country: | United States |
| Country Admin Divisions Title: | State |
| Country Admin Divisions Title 1: | County |
| Country Admin Divisions 1: | San Joaquin |
Rough and Ready Island is an island in the San Joaquin River, in the Sacramento–San Joaquin River Delta. It is in San Joaquin County, California, and its coordinates are 37.9508°N -121.3614°W. The United States Geological Survey measured its elevation as in 1981. It appears on 1913 and 2015 USGS map of the area.
The Rough and Ready Island Naval Supply Depot is located on the island.