Hager is the surname of several people:
- Åke Häger (1897–1968), Swedish gymnast
- Albert David Hager (1817–1888), American geologist
- Alva L. Hager (1850–1923), American politician
- Axel Hager, German beach volleyball player
- Britt Hager, American football player
- Cassie Hager, American basketball player
- Chris Hager, guitarist with heavy metal band Rough Cutt
- David Hager, American physician
- Friderich Christian Hager (1756–1795), Danish colonial commander and governor
- Hager Twins, Jim (1941–2008) and Jon (1941–2009), American country music singers
- Henry G. Hager, American politician
- Isaac Hager, American real estate developer
- Jake Hager, German-American wrestler and MMA fighter also known as Jack Swagger
- Jenna Bush Hager, daughter of President George W. Bush
- John Hager (cartoonist) (1858–1932), American cartoonist
- John F. Hager (1873–1955), American politician
- John H. Hager (1936–2020), American politician
- John Sharpenstein Hager (1818–1890), American politician
- Kristen Hager, Canadian actress
- Leopold Hager, Austrian conductor
- Liz Hager, American politician
- Mandy Hager, New Zealand writer
- Mark Hager, Australian field hockey player
- Nicky Hager, New Zealand author and investigative journalist
- Paul Hager (1925–1983), German theatre and opera director
- Peter Hager II (1784–1854), New York politician
- Robert Hager, American news analyst
- Rocky Hager, American football player
- Mordechai Hager, (1922-2018) Grand Rabbi of Vizhnitz-Monsey
- Shraga Feivish Hager, rebbe of the Kosov Hasidic dynasty
- Steven Hager, counterculture and marijuana activist
- Tobias Hager, German football player
