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.

Si Racha is known as the birthplace of the popular hot sauce, Sriracha, which is named after the town.

[3] Si Racha used to be part of Bang Lamung district which it borders today to its south.

[8] Unrelated to the oil spill, on 8 September the waters off Si Racha experienced a plankton bloom caused by recent monsoons that had occurred across the country, causing the beaches up to Bang Saen Beach to be covered by dead marine life, including ponyfishes, crabs, pufferfishes, and tilapias.