Lat Bua Luang (, ) is a district (amphoe) in the southern part of Ayutthaya province, central Thailand.
Tambon Lat Bua Luang was separated from Amphoe Bang Sai and officially upgraded to a district in 1947.
Neighbouring districts are (from the north clockwise) Bang Sai (à ¸Âà ¸²à ¸Âà ¸Âà ¹Âà ¸²à ¸¢), Sena, and Bang Sai (à ¸Âà ¸²à ¸Âà ¹Âà ¸Âà ¸£) of Ayutthaya Province, Sam Khok and Lat Lum Kaeo of Pathum Thani province, Sai Noi of Nonthaburi province, Bang Len of Nakhon Pathom province, and Song Phi Nong of Suphanburi province.
The district is divided into seven sub-districts (tambon). Lat Bua Luang is a township (thesaban tambon) covering parts of the tambon Lat Bua Luang.