The Thung Yai Naresuan Wildlife Sanctuary (Thai: เขตรักษาพันธุ์สัตว์ป่าทุ่งใหญ่นเรศวร, ) is a protected area in Thailand in the northern part of Kanchanaburi Province and the southern part of Tak Province. It was declared a wildlife sanctuary in 1972, and a World Heritage Site by UNESCO in 1991 together with the adjoining Huai Kha Khaeng Wildlife Sanctuary.
