Magnus Backes (17 September 1930 – 21 May 2019) was a German art historian and historic preservationist. From 1983 to 1991, he succeeded Werner Bornheim gen. Schilling and Hartmut Hofrichter as the third Landeskonservator of the General Directorate for Cultural Heritage Rhineland-Palatinate Rheinland-Pfalz in Mainz.