| Long Island | |
| Image Alt: | Aerial image of an island. |
| Pushpin Map: | United States Sacramento Delta#USA California#USA |
| Coordinates: | 38.1669°N -121.625°W |
| Location: | Northern California |
| Waterbody: | Sacramento–San Joaquin River Delta |
| Area Sqft: | or |
| Area Acre: | --> |
| Length Ft: | --> |
| Width Ft: | --> |
| Coastline Ft: | --> |
| Elevation Ft: | 7 |
| Country: | United States |
| Country Admin Divisions Title: | State |
| Country Admin Divisions Title 1: | County |
| Country Admin Divisions 1: | Sacramento |
Long Island is a small island in the Sacramento–San Joaquin River Delta. It is part of Sacramento County, California. Its coordinates are 38.1669°N -121.625°W, and the United States Geological Survey measured its elevation as in 1981. It appears on 1978 USGS maps of the area.