Van Schaick Island is an island in the city of Cohoes, New York. Van Schaick is a part of the delta of the Mohawk River at its mouth with the Hudson River. The island has been referred to by numerous names including Quehemesicos, Long, Anthony's, Isle of Cohoes, and Cohoes Island. The island was home to US Revolutionary War fortifications in the 18th century, and to an important shipyard in the 20th century.