Wat Suthiwararam School (Thai: โรงเรียนวัดสุทธิวราราม; RTGS: Rongrian Wat Suthi Wararam, IPA: [rōːŋrīːən wát su.tʰi.wáʔraːraːm]) or, in brief, ST (Thai: ส.ธ.) is a state all-boys school in Sathon, Bangkok, Thailand, for Matthayom 1 through 6. It was named by King Vajiravudh and established on July 3, 1911. The School's area holds 5 rai, 2 ngan, 320 square metres (approx. 2.25 acres).