Bager is a Danish surname. Notable people with the surname include:
Erling Bager (born 1946), Swedish politician Henning Bager (born 1981), Danish motorcycle speedway rider Johann Daniel Bager (1734–1815), German painter Jonas Bager, Danish footballer Kenneth Bager (born 1962), Danish musician and record producer Martin Bager (born 1982), Danish handball player
See also Louise Bager Due (born 1982), Danish handball player