Jo Dusseldorp, born Cornelis Gerardus Josephus Dusseldorp, was a Dutch pianist and conductor. He was born in Heerlen on 16 August 1928 and died in Maastricht on 28 December 2006. He was the son of Anna Maria Müller and Carolus Wilhelmus Josephus Dusseldorp, and was married to Anna Pauline Marie Ubaghs.
Dusseldorp began making music at an early age. At fifteen he started piano and organ studies at the Amsterdam Conservatory, where he studied with Willem Smalt and Johan van den Boogert. In 1950 he received a Prix d'Excellence; Eduard van Beinum, Willem van Otterloo, and Coenraad Lodewijk Walther Boer served on the jury. That year he also won the anniversary prize of the Amsterdam branch of the Society for the Promotion of Music. While still a student, he appeared on stage in recitals and as a concerto soloist. He continued his studies with Anthon van der Horst and Cornelius Berkhout.
He taught piano for many years at the Maastricht Conservatory and its predecessor, the Maastricht Municipal Music School, alongside Jean Franssen and Jean Antonietti. Among the Limburg musicians he trained were Tonie Ehlen and Joop Celis. In 1953, with Harry Biessen and Willy Paulissen, he founded the Mining District Chamber Orchestra, while continuing to perform as a soloist with the Limburg Symphony Orchestra.
On 1 November 1959, Dusseldorp began work with the Kerkrade Symphony Orchestra, an amateur symphony orchestra founded in 1955. In the late 1960s he was one of the conductors of the Southern Netherlands Opera, which went bankrupt in 1971. He continued performing into the 1980s, chiefly in Heerlen and the surrounding area, and taught for longer; from the 1990s onward he disappeared from public view.