Francis "Frank" Leo (born June 30, 1971) is a Canadian Catholic prelate who has served as Archbishop of Toronto since March 2023.

He earned a bachelor's degree at the Institut de Formation Théologique de Montréal (IFTM) and both a licentiate and a doctorate in theology at the International Marian Research Institute.

[1] He studied at the Pontifical Ecclesiastical Academy in Rome from 2006 to 2008 and then joined the diplomatic service of the Holy See.

He was posted to the apostolic nunciature in Australia from 2008 to 2011 and then to the Holy See Study Mission in Hong Kong for the year 2011 to 2012.

[3] In 2012 he returned to Montreal to take up appointments as director and dogmatics teacher at the Major Seminary, director of the IFTM's Department of Canon Law, and vice president of the archdiocesan vocations service.