Rainis (disambiguation)
Rainis stands for:
geography
- Rainis (Karakelong) , place on the Indonesian island of Karakelong
 - Rainis (Talaud Islands) , district on the Indonesian island of Karakelong
 - Rainis Bay, bay on the east coast of Karakelong Island
 
people
- Rainis ( Jānis Pliekšāns ; 1865–1929), Latvian poet, playwright, translator and politician