The Kalinga script or Southern Nagari is a Brahmic script used in the region of what is now modern-day Odisha, India and was primarily used to write Odia language in the inscriptions of the kingdom of Kalinga which was under the reign of early Eastern Ganga dynasty. By the 12th century, with the defeat of the Somavamshi dynasty by the Eastern Ganga monarch Anantavarman Chodaganga and the subsequent reunification of the Trikalinga(the three regions of ancient Odra- Kalinga, Utkala and Dakshina Koshala) region, the Kalinga script got replaced by the Siddhaṃ script-derived Proto-Oriya script which became the ancestor of the modern Odia script.

The Brahmic scripts, also known as Indic scripts, are a family of abugida writing systems. They are used throughout the Indian subcontinent, Southeast Asia and parts of East Asia. They are descended from the Brahmi script of ancient India and are used by various languages in several language families in South, East and Southeast Asia: Indo-Aryan, Dravidian, Tibeto-Burman, Mongolic, Austroasiatic, Austronesian, and Tai. They were also the source of the dictionary order (gojūon) of Japanese kana.