Kotlik is a city in the U.S. state of Alaska. It is part of the Kusilvak Census Area approximately 35 miles northeast of Emmonak in the Yukon-Kuskokwim Delta. The city has a total area of 4.7 square miles at 63°2′9″N 163°33′37″W. At the 2010 census data, Kotlik total population was 577. The population density was 137.69/sq mi. Races were predominantly White. Recent job growth is negatively decreased by 0.74 percent. Kotlik is using Zip code 99620.