Si Racha is a subdistrict and town in Thailand on the east coast of the Gulf of Thailand, about 120 km southeast of Bangkok in Si Racha district, Chonburi province. The town is the center of the Si Racha district, the ninth-largest urban city area in Thailand. Si Racha is in the industrial Eastern Seaboard zone, along with Pattaya, Laem Chabang, and Chonburi. It is also part of the Pattaya-Chonburi Metropolitan Area, a conurbation with a population of 999,092 people.