South Naknek is a census-designated place located in the U.S. state of Alaska. It is part of the Bristol Bay Borough. South Naknek has a total area of 97.5 square miles at 58°42′42″N 157°1′3″W. As of 2010 census, the total population of South Naknek was 79. It had a population density of 0.81/sq mi. Bristol Bay High School serves secondary education for young residents of South Naknek. Recent job growth is negatively decreased by 22.71 percent. Estimated per capita income of South Naknek in 2015 was $40,230. It has an average travel time of 19 minutes. Zip code is 99670.