Ruba may refer to:
People
- Máel Ruba (642–722), Irish saint
- Ruba Ghazal (born 1977), Canadian politician
- Ruba Katrib, American curator
- Ruba Nadda (born 1972), Canadian film director
Places
- Ruba, Belarus
- Ruba Parish, Latvia
Food
- Ullucus, a root vegetable
Science
- Rubredoxin A, protein component of photosynthesis
- Ruba (fly), a genus of insects in the family Stratiomyidae