Rhode Island is a small, partially submerged island in the San Joaquin River delta, in California.

[2] It is part of Contra Costa County.

Its coordinates are 37°59′59″N 121°34′31″W / 37.9996445°N 121.5752300°W / 37.9996445; -121.5752300 (Rhode Island)[1].

It appears on a 1952 United States Geological Survey map of the area.

This Contra Costa County, California–related article is a stub.