Phu Pha Daeng Wildlife Sanctuary (Thai: เขตรักษาพันธุ์สัตว์ป่าภูผาแดง;RTGS: Khet Raksa Phan Satpa Phu Pha Daeng) is a wildlife sanctuary in Lom Sak District of Thailand's Phetchabun Province.

The sanctuary covers an area of 235 square kilometres (91 sq mi) and was established in 1999.

Phu Pha Daeng Wildlife Sanctuary is located about 35 kilometres (22 mi) northeast of Phetchabun town in Ban Klang, Ban Tio, Chang Talut, Huai Rai, Pak Chong and Thai Ibun subdistricts of Lom Sak District of Phetchabun Province.

[2] The sanctuary's area is 235 square kilometres (91 sq mi) and is abutting Nam Nao National Park to the north and east and Tat Mok National Park to the south.

This part of the Phetchabun Mountains has several small streams, which are tributaries of the Pa Sak River.