Kasigluk is a census-designated place located in the U.S. state of Alaska. It is part of the Bethel Census Area that has two smaller villages, the Akiuk and Akula. Kasigluk is 20 miles in northwest Bethel. It has a total area of 13.1 square miles at 60°53′31″N 162°32′9″W. Wind power is the primary source for their electrical needs. As of 2010 census, the total population of Kasigluk was 569 people. It had a population density of 47/sq mi. Estimated per capita income in 2015 was $8,461. Kasigluk Zip code is 99609.