Suphan Buri (Thai: สุพรรณบุรี, pronounced [sù.pʰān būrīː]), located in the central region of Thailand, is one of the country's 76 provinces (จังหวัด, changwat), its first-level administrative divisions. Suphan Buri's neighbouring provinces are (from north clockwise) Uthai Thani, Chai Nat, Sing Buri, Ang Thong, Phra Nakhon Si Ayutthaya, Nakhon Pathom and Kanchanaburi. In 2018, the province had a population of around 848,700, making up about 1.28% of the Thailand's total.
Suphan Buri Province has a moderately diverse ethnic population, the majority of which are of Tai, Mon, Lao, Chinese, and Khmer descent.