Ruga
Ruga may refer to:
- Ruga (anatomy), an anatomical fold
 - Ruga, Nepal
 - Ruga language, an extinct Sino-Tibetan language that was spoken in Meghalaya, India
 - Ruga-Ruga, irregular troops in Eastern Africa, often deployed by western colonial forces
 - Rugila, 5th-century Hunnic ruler
 - Spurius Carvilius Ruga, 3rd-century Roman grammarian who invented the letter g