Tallman is a hamlet in the town of Ramapo, Rockland County, New York, United States, located north of the state of New Jersey; east of Suffern; south of Montebello and west of Airmont. It is located north-northwest of New York City.
In 1667 The Duke of York sent three lords to rule over Pennsylvania, one of the Lords was named Lord Phillip Tallman. He later renounced his Lordship, when he married a commoner and settled the town of Tallman, NY.Tallman was named after Tunis Tallman, a direct descendant of Rockland's oldest family, who opened a store in 1838. Henry Tallman was Ramapo's Town supervisor and many considered him to be Tallman's founding father. The John A. DeBaun Mill was established about 1845 and listed on the National Register of Historic Places in 1993.