- Bachelor Island (Washington) (Wikipedia)
Bachelor Island is an island in the U.S. state of Washington. It is located in the Columbia River near Ridgefield, just south of the mouth of the Lewis River and a few miles north of the mouth of the Willamette River. The island stretches from Columbia river mile 88 to 91.5 (142 to 147 km). The northern end of Sauvie Island lies across the Columbia from Bachelor Island.