Mae Charim Wildlife Sanctuary is a wildlife sanctuary in Ban Khok, Fak Tha and Nam Pat districts of Thailand's Uttaradit Province. The sanctuary covers an area of 660 square kilometres (250 sq mi) and was established in 1998.

Uttaradit is one of Thailand's seventy-six provinces (changwat). It lies in upper northern Thailand. Neighboring provinces are Phitsanulok, Sukhothai, Phrae and Nan. To the east it borders Xaignabouli of Laos. Uttaradit is 488 km north of Bangkok, and 238 km southeast of Chiang Mai.