Allard de Ridder (3 May 1887 – 13 May 1966) was a Dutch–Canadian conductor, violist, and composer. He was notably the first conductor of both the Vancouver Symphony Orchestra and the Ottawa Symphony Orchestra, the latter of which he founded in 1944. As a composer he produced several orchestral works, including a violin concerto, four symphonic poems, a Sketch for flute, violin, and orchestra, Overture in D, and Intermezzo. He also wrote a string quartet, the scherzo Beware of Love for a cappella choir, and a number of songs.