Whidbey Island is approximately 37 miles (60 km) from north to south, and 1.5 to 10 miles (2.4 to 16.1 km) wide, with a total land area of 168.67 square miles (436.9 km2),[7] making it the 40th largest island in the United States. It is ranked as the fourth longest and fourth largest island in the contiguous United States, behind Long Island, New York;[8][9] Padre Island, Texas (the world's longest barrier island);[10] and Isle Royale, Michigan.[11] In the state of Washington, it is the largest island, followed by Orcas Island.