Bloody Island may refer to:
Bloody Island (Mississippi River), a former sandbar island in the Mississippi River oppose St. Louis, Missouri, now part of Illinois Bloody Island, a former island in Clear Lake in California Bloody Island Massacre, an 1850 massacre, for which the California island is named, of Pomo Indians by the U.S. Army Gunther Island in Humboldt County, California, site of an 1860 massacre of Indians