Sinclair Island (Washington)
Sinclair Island is an island in the U.S. state of Washington. It is a part of, and lies off the western shore of mainland Skagit County. The island has a land area of 4.109 km² (1.586 sq mi) and is home to only a few private residents.
The name Sinclair was given by Charles Wilkes during the Wilkes Expedition of 1838-1842. It honors Arthur Sinclair, who was captain of General Pike during a naval battle of the War of 1812.
Coordinates: 48°37′15″N 122°40′34″W / 48.62083°N 122.67611°W
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