Sukhothai (thai สุโขทัย) is a small modern town about 427 km (267 miles) north of Bangkok on the River Yom, a tributary of the Chao Phraya River. Population 37,000, geographical location 17° 0' North, 99° 51' East. The city is located 12 km to the east of the historic city of Sukhothai, which was the capital of the first Thai kingdom, usually called Sukhothai kingdom, hence the modern city is often called New Sukhothai. Sukhothai is the capital of the Sukhothai province.
The Sukhothai kingdom was a kingdom in the north of Thailand around the city Sukhothai.
The city of Sukhothai was part of the Khmer empire until 1238, when two Thai chieftains, Pho Khun Pha Muang and Pho Khun Bang Klang Hao, seceded and established a Thai kingdom.
Sukhothai became a tributary state of Ayutthaya between 1365 and 1378, and in 1438 a mere province.