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Tarbox, Massachusetts is a fictional town that serves as the setting for the 1968 novel Couples and several short stories by American author John Updike. It is based on Ipswich, Massachusetts, the small coastal town where Updike lived from 1957 to 1974.
Tarbox was founded in 1634 and is located near Plymouth, approximately 30 miles south of Boston (the same distance that Ipswich is north of Boston). Its permanent population is about 8,000 and it contains hundreds of small-yarded homes as well as many 17th century saltboxes.