Kamboja (Sanskrit: कम्बोज) may refer to:
- Kambojas, an ancient tribe of Transoxiana and the Paropamisus in Iron Age India
- Kambojan, an Indo-Iranian language of these people
- Aśvaka, a people of ancient India, either related to the above or a distinct people
- Kamboja Kingdom, these people as mentioned in the ancient Indian epic Mahabharata
- Sudakshina, a king of the Kamboja Kingdom in the epic
- Prapaksha Kamboja, a prince of the Kamboja Kingdom in the epic
- Parama Kamboja Kingdom, another kingdom of these people in the epic
- Komedes, in Greek sources
- Dvārakā–Kamboja route, a route in ancient India, from the Kamboja territory to the city of Dvaraka
- Kambu Swayambhuva, progenitor of the Kambojas in Indian mythology
- Upamanyu Kamboja or Upamanyu, a sage of Hinduism
- Aupamanyava Kamboja, his son
- Kamboja-Pala Dynasty of Bengal (c. 10th-11th centuries)
- Rajyapala Kamboja, the founder of the dynasty
- Dharmapala Kamboja, last ruler of the dynasty
- Kamboj, a clan of South Asia
- Kamboj (Chhimba clan), a clan of the Chhimba caste in India
- Prostylotermes kamboja, an extinct termite genus of India