Flor Alpaerts (Antwerp, 12 September 1876 – Antwerp, 5 October 1954) was a Belgian conductor, pedagogue and composer. He graduated from the Vlaamse Muziekschool in 1901.
He was artistic director of the Peter Benoit Foundation, co-director of the Royal Flemish Opera and a member of the Royal Academy of Belgium. As a composer he became the leading Flemish impressionist, with the symphonic poem Pallieter (1921-1924).
Notable students include composer Denise Tolkowsky.