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 {{dab