The Ang Trapaing Thmor Crane Sanctuary is a protected area of Cambodia on the site of a large Khmer Rouge irrigation project built during the 1970s. The sanctuary was gazetted on 1 January 1999 and covers an area of 10,250 hectares. The reserve was set aside to protect the rare Eastern Sarus Crane (Grus antigone sharpii). Prior to the discovery of the crane at Trapaing Thmor, there were thought to be fewer than 1,000 of the birds left alive in the world .
The Crane sanctuary is located in north western Cambodia, not far from the border with Thailand. The entire 10,000 hectares of the protected area is contained within Phnom Srok District of Banteay Meanchey Province. Phnom Srok district shares a border with Siem Reap and Oddar Meanchey Provinces. Reading from the north clockwise, Phnom Srok borders with Banteay Ampil and Chong Kal districts of Oddar Meanchey province to the north. The eastern border of the district is shared with Srei Snam and Kralanh districts of Siem Reap province. To the south the district shares a border with Preah Net Preah District of Banteay Meanchey. The western border of the district joins with Svay Chek and Thmor Pouk districts also of Banteay Meanchey. The sanctuary can be accessed by road from Sisophon (70 km) or Siem Reap (city) (90 km) via National Highway 6 initially then via smaller unsealed district roads to Ang Trapaing Thmor.
Ang Trapaing Thmor sanctuary is also an important conservation area for a number of other threatened species. One globally threatened primate species, the Long Tailed Macaque (Macaca fascicularis) is found within the sanctuary. One globally threatened ungulate species, the Eld's Deer (Rucervus eldii) and three globally threatened turtle species, the Asian Box Turtle (Cuora amboinensis), the Malayan Snail Eating Turtle (Malayemys subjriguga) and the Elongated tortoise (Indotestudo elongata) are also found within Ang Trapaing Thmor.