Naknek is a census-designated place located in and the borough seat of Bristol Bay Borough in the U.S. state of Alaska. As of the 2020 census, the population of the CDP was 470, down from 544 in 2010. Naknek is located on the north bank of the Naknek River, close to where the river runs into the Kvichak Bay arm of the northeastern end of Bristol Bay. South Naknek is on the other side of the river.