Deadman Island is an island near Suisun Bay. It is part of Solano County, California, and not managed by any reclamation district. Its coordinates are 38°13′14″N 122°01′41″W, and the United States Geological Survey measured its elevation as 7 ft (2.1 m) in 1981. It is labeled, along with Joice Island, Grizzly Island, Simmons Island, Ryer Island and Roe Island, on a 1902 USGS map of the area.
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