Graham H. Chapin (1799–1843) was an American lawyer and politician who served as a member of the United States House of Representatives from New York.
Born Graham Hurd Chapin on February 10, 1799, in Salisbury, Connecticut, he received his early education in local schools before attending Yale College, from which he graduated in 1819. Following his graduation, he studied law and was admitted to the bar in 1822. He subsequently established a legal practice in Lyons, New York.
Chapin’s political and legal career was centered in Wayne County, New York. He served as the district attorney for the county from 1826 to 1833 and briefly held the office of surrogate in 1833. In 1834, he was elected as a Jacksonian candidate to the Twenty-fourth Congress, representing New York’s 25th congressional district. He served a single term from March 4, 1835, to March 3, 1837, and did not seek renomination for a subsequent term.
Following his tenure in the House of Representatives, Chapin relocated to Rochester, New York, in 1837, where he resumed his private legal practice. He remained in Rochester until his death on September 8, 1843. He was interred in Mount Hope Cemetery in Rochester.