Richard Hageman (9 July 1881 – 6 March 1966) was a Dutch-born American conductor, pianist, composer, and actor.
Hageman was born and raised in Leeuwarden, Friesland, Netherlands. He was the son of the Maurits Hageman of Zutphen, a violinist, pianist and conductor, and of Hester Westerhoven of Amsterdam, a singer who performed under the name Francisca Stoetz. A child prodigy, he was a concert pianist by the age of six. He studied at the conservatories of Amsterdam and Brussels. As a young man he was an accompanist for singers and with the Nederlandsche Opera, of which he conducted for the first time in 1899. He became the artistic director briefly in 1903, the same year he married the soprano Rosina van Ophemert, who took the stage name Rosina van Dyke/van Dyck (Rosina van Dijk was the maiden name of her grandmother). For a short time he was accompanist to Mathilde Marchesi in Paris. He travelled to the United States in 1906 to accompany Yvette Guilbert on a national tour. He stayed and eventually became an American citizen in 1925. Rosina sang at the Metropolitan Opera, but the couple had an acrimonious divorce in 1916.