Suphan Buri located in the central region of Thailand, is one of the country's 76 provinces, the first-level administrative divisions. Neighbouring provinces are Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Nakhon Pathom and Kanchanaburi. As of 2018 the province counted a population of around 848,700, representing about 1.28% of the country's population.

The provinces of Thailand are administrative divisions of the government of Thailand. The country is divided into 76 provinces proper, with one additional special administrative area. They are the primary local government units and act as juristic persons. They are divided into amphoe (districts) which are further divided into tambon, the next lower level of local government.