Kasigluk is a census-designated place (CDP) in the Bethel Census Area in the U.S. state of Alaska. Kasigluk consists of two smaller villages, called Akiuk and Akula. According to the United States Census Bureau, the CDP has a total area of 13.2 square miles (34 square kilometers), of which, 12.2 square miles (32 square kilometers) of it is land and 1.1 square miles (2.8 square kilometers) of it (8.00%) is water. There were 110 housing units at an average density of 9.0/sq mi (3.5/square kilometers). The racial makeup of the CDP was 3.31% White, 96.50% Native American, and 0.18% from two or more races.