Quanta is the plural of quantum.
Quanta may also refer to:
- Quanta Computer, a Taiwan-based manufacturer of electronic and computer equipment
- Quanta Display Inc., a Taiwanese TFT-LCD panel manufacturer acquired by AU Optronics
- QUANTA, a user group for the Sinclair QL computer
- Quanta Services, a US-based speciality contractor for the electric, gas, and telecommunications industries
- Quanta Technology, a utility infrastructure consulting company