Nakhon Ratchasima is the capital of Nakhon Ratchasima province, the largest city in Northeastern Thailand and the third-largest city in Thailand. It is 250 kilometres (160 mi) northeast of Bangkok, one of the four major cities of Isan, known as the "big four of Isan", and has a population of 466,098 people as of 2021. The city is commonly known as Korat, a shortened form of its name.