Koliganek is a census-designated place in Dillingham Census Area, Alaska, United States. It is located along the Nushagak River At the 2010 census, the population was 209, up from 182 in 2000. Koliganek is located at 59°43′44″N 157°16′38″W / 59.72889°N 157.27722°W, along the Nushagak River.