The name given to the northern part of Sri Lanka, with Pulatthipura as centre, as opposed to Rohaṇa (e.g., Cv.lxx.184 f ) and Dakkhiṇadesa (Cv.lxxii.176-9). Later, the name was changed to Patiṭṭhāraṭṭha (e.g., Cv.lxxxii.26).

Rājaraṭṭha was the scene of many conflicts between the Singhalese and the invaders who came from time to time from South India, until, in the end, it was abandoned, and the Singhalese capital moved southwards. Rājaraṭṭha was also called Rājinoraṭṭha. e.g., Cv.lii.4.