The Sukhothai historical park covers the ruins of Sukhothai, the capital of the Sukhothai kingdom from the 14th century, which today is situated in the north of Thailand.

The city walls form a rectangle about 2 km east-west by 1.6 km north-south. There is a gate in the centre of each wall. Inside are the remains of the royal palace and twenty-six temples, the largest being Wat Mahathat. The Park is maintained by the Fine Arts Department of Thailand with help from UNESCO, who have deemed it a World Heritage Site.

The protection of the area was first announced in Volume 92, Part 112 of the Royal Gazette on August 2, 1961. In 1976 the restoration project was approved, and in July 1988 it was officially opened. On December 12, 1991, it was declared a World Heritage site, together with the assorted parks of Kampang Phet and Si Satchanalai .