Giger is a surname and may refer to:
- Albert Giger (born 1946), Swiss cross-country skier
- Fabrice Giger (born 1965), Swiss publisher and film producer
- H. R. Giger (Hans Ruedi Giger, born 1940), Swiss painter, sculptor, and set designer
- Paul Giger (born 1952), Swiss violinist and composer
- Peter Giger (born 1939), Swiss percussionist and bandleader
- Walter Giger (born 1943), Swiss environmental chemist
- Werner Giger (1949–1974), Swiss motorcycle racer