Kalinga is a historical region of India. It is generally defined as the eastern coastal region between the Ganges and the Godavari rivers, although its boundaries have fluctuated with the territory of its rulers. The core territory of Kalinga now encompasses all of Odisha and some part of northern Andhra Pradesh. At its widest extent, the Kalinga region also included parts of present-day Chhattisgarh, extending up to Amarkantak in the west. In the ancient period it extended until the bank of the Ganges river.