Koyna Wildlife Sanctuary is a wildlife sanctuary and natural World Heritage Site, which is located in Satara district of the Indian state of Maharashtra. Further, this wildlife sanctuary is designated as an Important Bird area. The sanctuary is nested in the Western Ghats, covering an area of around 423.55 km², and elevations ranging from 600 to 1,100 m. It was notified in 1985 as a wildlife sanctuary situated in Maharashtra. It forms the northern portion of the Sahyadri Tiger Reserve, with Chandoli National Park forming the southern part of the reserve.