Ruba
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