Mennander; 19 July 1712, Stockholm – 22 May 1786) was the bishop of Turku in Finland from 1757–1775 and then the archbishop of Uppsala in the Church of Sweden from 1775 to his death.

[1] He arrived as a student at the University of Uppsala in 1731 and got acquainted with the botanist Carl Linnaeus.

He stayed in Turku for fifteen years, and made several important improvements there within the school system and hospital facilities.

He became highly engaged in the matters of the Uppsala University and published many disputations, speeches and dissertations.

Mennander was also a member of Pro Fide et Christianismo, a Christian education society.