André Isoir (20 July 1935 – 20 July 2016) was a French organist. Isoir studied with Édouard Souberbielle (organ) and Germaine Mounier (piano) at the École César-Franck and under Rolande Falcinelli at the Paris Conservatoire where he won the first prizes in organ and improvisation in 1960. André Isoir was organist titulaire at St-Médard in Paris from 1952 to 1967 and at St. Severin in 1967. Since 1973 he has been titulaire (head organist) at the ancient Abbey of Saint-Germain-des-Prés in Paris. He died on 20 July 2016 at the age of 81.