Hagger as a surname may refer to:
- Kim Hagger, British athlete, born 1961
- Lloyd Hagger, Australian rules footballer, born 1898
- Nicholas Hagger, British poet and author, born 1939
- Peter Hagger, British trade unionist, born 1944 and died 1995
- Rubeus Hagrid, a character in the fictional Harry Potter universe, is referred to this way by his half-brother Grawp