Si Racha is a district in Chonburi province, Thailand. Its center is the town of Si Racha, on the Gulf of Thailand, about halfway between Chonbu…Si Racha is a district in Chonburi province, Thailand. Its center is the town of Si Racha, on the Gulf of Thailand, about halfway between Chonburi and Pattaya. The name Si Racha is from Sanskrit Śrī Rāja via Pali.