Henry William Poor (June 16, 1844 – April 1915) was an American banker, , and author.
Henry William Poor was born in Bangor, Maine, in 1844, the son of Henry Varnum Poor. The family moved to New York City when he was five years old, and he spent his youth there. He attended Harvard College, graduating in 1865. The firm that he and his father established in 1868, H. V. & H. W. Poor, was a predecessor to the business that eventually became Standard & Poor's.
He became prominent as a stockbroker and investor, but had to liquidate his business in 1908 following some major losses.
He was also widely known as a book collector and a patron of the arts.
He died in New York City April 13, 1915.