Haimo or Haymo, or similar variants, can mean:
- Haimo (dapifer), Norman landowner and High Sheriff of Kent
- Haymo of Halberstadt, German Biblical scholar of the ninth century
- Haimo of Auxerre, French Biblical scholar of the ninth century
- Haymo of Faversham, English Franciscan of the thirteenth century
- Deborah and Franklin Haimo Awards for Distinguished College or University Teaching of Mathematics
- Haemus Latin name for, Greek Haimos, mythical king transformed into the Balkan mountains
- Haemus Mons, Latin name for the Balkan mountains
- Haymo Lestrange, husband of Isabella of Ibelin, Queen of Cyprus from 1272–1273