Sukhothai (thai สุโขทัย) is a small modern town about 427 km (265 mi) north of Bangkok on the River Yom, a tributary of the Chao Phraya River. Population 37,000. The city is located 12 km to the east of the historic city of Sukhothai (city), which was the capital of the first Thai kingdom, usually called the Sukhothai Kingdom, hence the modern city is often called New Sukhothai. Sukhothai is the capital of Sukhothai province.