Lopburi is a province in the central region of Thailand. The province is divided into 11 administrative districts, and Mueang Lopburi district is the capital. With over 750,000 people, the province is Thailand's 36th largest area and 32nd most populous. There are eight neighboring provinces, Phetchabun, Chaiyaphum, Nakhon Ratchasima, Saraburi, Phra Nakhon Si Ayutthaya, Ang Thong, Sing Buri, and Nakhon Sawan.

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.