Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Udon Thani is a city in Isan, north-east Thailand, and the capital of Udon Thani Province.The province of Udon Thani has a population of 1,467.200, the city alone 500.000. Geographical location 17°25 N 102°45 E / 17.417°N 102.75°E / 17.417; 102.75 and is approximately 560 km from Bangkok. Udon is also a major commercial centre in northern Isan and the gateway to Laos, North Vietnam and Southern China.47 km east of Udon Thani is Thailand's premier Bronze Age excavation at Ban Chiang, the world-renowned archaeological site.