Perrin Henry McGraw (December 28, 1822 McGrawsville, Cortland County, New York – October 16, 1899) was an American merchant and politician from New York.
He was the son of Assemblyman Harry McGraw (c.1797–1849) and Sally (Smith) McGraw (d. 1874). He became a merchant. On April 26, 1846, he married Louisa Pritchard (1824–1890), and they had several children. He was Postmaster of McGrawsville from 1849 to 1853.
He was a member of the New York State Assembly (Cortland Co.) in 1854; and a member of the New York State Senate (23rd D.) in 1860 and 1861.
He was buried at the McGraw Rural Cemetery.