The City of Kodiak is the main city and one of seven communities on Kodiak Island in Kodiak Island Borough, Alaska. All commercial transportation between the island's communities and the outside world goes through this city via ferryboat or airline. As of the 2020 census, the population of the city is 5,581, down from 6,130 in 2010. It is the tenth-largest city in Alaska.

Kodiak Island is a large island on the south coast of the U.S. state of Alaska, separated from the Alaska mainland by the Shelikof Strait. The largest island in the Kodiak Archipelago, Kodiak Island is the second largest island in the United States and the 80th largest island in the world, with an area of 3,595.09 sq mi (9,311.2 km2), slightly larger than Cyprus. It is 160 km long and in width ranges from 16 to 97 kilometers. Kodiak Island is the namesake for Kodiak Seamount, which lies off the coast at the Aleutian Trench. The largest community on the island is the city of Kodiak, Alaska.