 The three "tambons", Nong Yai, Khlong Phlu, and Nong Suea Chang were split off from Ban Bueng District.It was upgraded to a full district on 13 July 1981.Neighboring districts are (from the south clockwise) Wang Chan and Pluak Daeng of Rayong Province, Si Racha, Ban Bueng and Bo Thong of Chonburi Province.