Uthai Thani (Thai อุทัยธานี) is one of the provinces (changwat) of Thailand. Neighboring provinces are (from north clockwise) Nakhon Sawan, Chai Nat, Suphan Buri, Kanchanaburi, and Tak. It is in Thailand's lower northern region, somewhat off the route between Bangkok and Chiang Mai. It is approximately 200 km from Bangkok.