French Island is a small island in the Sacramento–San Joaquin River Delta. It is part of Solano County, California. Its coordinates are 38°15′51″N 121°41′38″W, and the United States Geological Survey measured its elevation as 0 ft (0 m) in 1981. It appears on USGS maps in 1952 and 1978, with the same shape and elevation.
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