Patrick O'Reilly (May 19, 1900 in Saint-Mihiel – August 6, 1988 in Paris 14th) was a French priest, Marist religious and ethnologist, responsible for the organization of the Gauguin Museum in Tahiti.

Son of André Farell O'Reilly, battalion commander, and Jeanne Gautier, the young boy studied in religious establishments in Le Havre and Saintes.

In these positions, he met a certain number of students called to a promising future, notably François Mitterrand[2] of whom he remained a confidant until the end of his days.

[4][5] Designated as secretary general of the Society of Oceanists with the agreement of Maurice Leenhardt in the fall of 1944, he held this position until 1973.

[8] The correspondence of Odette Teissier du Cros, her friend and confidante, is today deposited in the archives of the Académie des Hauts Cantons.