Aleksi Emanuel Lehtonen (21 June 1891 – 27 March 1951) was archbishop of Turku from 1945 till 1951.

He attended school in Uusikaupunki, where he graduated as a student at the age of 16.

He was ordained to priesthood on 10 June 1911 and was appointed as priest in Lavia.

He was consecrated that same year in Tampere Cathedral by three bishops, Erkki Kaila of Viipuri, Max von Bonsdorff of Borgå and Erling Eidem of Uppsala.

It was through him that the apostolic succession was reinstated in the Church of Finland through the consecration initiated by Erling Eidem, the Archbishop of Uppsala.