The Rishikas (also Rshika and Ṛṣika) are a possibly-mythical tribe of Central Asia and South Asia, who are mentioned in Hindu and Sanskrit literary texts, including the Mahabharata, the Ramayana, the Brhat-Samhita, the Markendeya Purana and Patanjali's Mahabhasya.
Some historians believe the Rishikas were a part of, or synonymous with, the Kambojas. However, there are other theories regarding their origins.
Classical literary texts state that the Rishikas were neighbors of the Parama Kambojas and the Lohas in Saka-dvipa ("Sakaland") (most likely Transoxiana).
According to traditional accounts, during the 2nd century BCE a subgroup of Rishikas migrated to southwesterm India and settled there, crossing Afghanistan, Balochistan, Sindhu and Sovira. According to the Mahabharata, there two sub-tribal were divisions within the Rishikas: Uttara ("northern") and Parama ("supreme") .
Sanskrit scholar Ishwa Mishra believes that the Rishikas were synonymous with the Parama Kambojas. V. S. Aggarwala also relates the Parama Kambojas of the trans-Pamirs to the Rishikas of the Mahabharata located in the Shakdvipa. According to B. N. Puri, the Kambojas were a branch of the Tukharas. Based on Rishika-Kamboja connections, some scholars believe that the Kambojas were a branch of the Yuezhi. Moti Chander also sees a close ethnic connection between the Kambojas and the Yuezhi.