Tyonek is a census-designated place located in Alaska, USA. It is within Kenai Peninsula Borough. It was formed Tyonek Native Corporation (TNC) under ANCSA and is federally recognized in 1973. Tyonek has a total area of 68.8 square miles at 61.068°N 151.141°W. In 1778, a Dena'ina Alaska Native village at Tyonek was transcribed by the explorer James Cook. On 2000 census data, the total population of Tyonek was 193. It had a population density of 2.9/sq mi. Races were predominantly White with 95.34 percent. As of 2015, the CDP estimated per capita income was $18,578. Tyonek has Zip code 99682.