Mager is a surname. People with the surname include:
Georges Mager (1885–1950), French trumpeter Gianluca Mager (born 1994), Italian tennis player Jörg Mager (1880-1939), German musician and electronic music pioneer Karl Mager (1810–1858), German educator Manuela Mager (born 1962), German figure skater NB Mager, writer and director of the 2026 film Run Amok