Sitkinak Island is an island of the Kodiak Archipelago of the state of Alaska, United States. It lies south of the southern tip of Kodiak Island in the western part of the Gulf of Alaska. Tugidak Island lies to its west. The two islands are the largest components of the of Alaska. The Trinity Islands, and thus Sitkinak, are part of the Gulf of Alaska unit of Alaska Maritime National Wildlife Refuge. Sitkinak Island has a land area of 235.506 km2 (90.929 sq mi) and no resident population. Cattle Operation