Uthai Thani is a town (thesaban mueang) in Thailand, capital of the Uthai Thani province, in the Lower North of the country. It covers the whole tambon Uthai Mai of Mueang Uthai Thani district. The town is situated on the right bank of the Sakae Krang River, a few kilometres upstream from where it flows into the Chao Phraya. As of 2008 it has a population of 16,787.