Charles Hayden (July 8, 1870 – January 8, 1937) was an American banker, businessman, financier and philanthropist. He was the senior partner of Hayden, Stone & Co. and his influence was such that James W. Gerard listed him among those "who are too busy to hold political office, but determine who shall." Noted contributions bearing his name include the Hayden Planetarium in New York, the Charles Hayden Planetarium at Boston's Museum of Science, and the Charles Hayden Foundation. Instrumental in the financing of Arizona copper mines and smelters, the smelting community of Hayden, Arizona was named for him.