Hagg or Haggs may refer to:
- Hagg
- Hägg, Swedish surname
- Arthur Ernest Hagg (1888–1985), British aircraft and boat designer
- Eric Hagg (born 1989), former American football safety
- Fox Hagg, a nature reserve in Sheffield
- Robert Hagg (born 1995), Swedish ice hockey player
- Russell Hagg (born 1938), Australian designer and director
- Levitt Hagg, largely abandoned hamlet in South Yorkshire, England
- Henry Hagg Lake, artificial lake in northwest Oregon, United States
- Ḥaǧǧ: Hajj, annual Muslim pilgrimage to Mecca
- Haggs
- Haggs, village in Falkirk, Scotland
- Haggs Castle, 16th-century tower house, Pollokshields, Glasgow, Scotland
- Sea Haggs, 1990s Australian indie rock band