François Andreossy

François Andréossy (1633–1688) was a French engineer and cartographer.

François Andréossy was born in Paris on 10 June 1633. He used his knowledge of Italian canals and the works of Leonardo da Vinci to design a system of multiple locks for the Canal du Midi together with Pierre-Paul Riquet. He was also responsible for the levelling and the drawing of maps. He monitored the construction and assisted Riquet until Riquet's death. Andréossy continued to work at the canal and serve the family of Riquet until he died in Castelnaudary on 3 June 1688.

Andréossy's descendants continued like him for a century. His great-grandson, the general Antoine-François Andréossy, argued in his "Histoire du Canal du Midi" that his ancestor should be considered the father of the Canal du Midi, instead of Riquet.