Jaki (Jáki Szaniszló László) (17 August 1924 in Gyor, Hungary – 7 April 2009 in Madrid, Spain) was a Hungarian-born priest of the Benedictine order.
From 1975 to his death, he was Distinguished University Professor at Seton Hall University, in South Orange, New Jersey.
He held doctorates in theology and in physics and was a leading contributor to the philosophy of science and the history of science, particularly to their relationship to Christianity.
In 2018, Jaki was named one of five Catholic scientists "that shaped our understanding of the world" by Aleteia; the other four are: Copernicus, Gregor Mendel, Giuseppe Mercalli and Georges Lemaitre.