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is a city in Jackson County, Iowa, United States. The population was 670 at the 2000 census. It is the state of Iowa's only island city. It has a beach and campground.
The Army Corps of Engineers constructed many locks and dams on the Mississippi River. The construction of Lock and Dam #13 between Clinton, IA and Fulton, IL in 1939 left Sabula an island .
According to the United States Census Bureau, the city has a total area of 1.4 square miles (3.5 km²), of which, 0.4 square miles (1.0 km²) of it is land and 1.0 square miles (2.5 km²) of it (71.53%) is water.