Emmonak is a city in Kusilvak Census Area, Alaska, United States. At the 2010 census the population was 762, down from 767 in 2000. Emmo…Emmonak is a city in Kusilvak Census Area, Alaska, United States. At the 2010 census the population was 762, down from 767 in 2000. Emmonak is located in the large delta of the Yukon River at 62°46′38″N 164°32′42″W / 62.77722°N 164.54500°W.