Jon Cortina Garaigorta, S.J. (Bilbao, December 8, 1934 – Guatemala City, December 12, 2005) was a Jesuit priest, engineer, and activist, founder of Pro-Búsqueda, an organization dedicated to searching for the missing children of the Salvadoran Civil War. He was a professor at Central American University (UCA), the Jesuit university of El Salvador, and escaped the massacre of the Jesuit community at the university in November 1989.