Ang Soon Tong is a secret society and gang based in Singapore and Malaysia which has been active since the 1950s, mainly in the Sembawang area of Singapore. The gang engages in criminal activities including drug trafficking, arms smuggling, illegal moneylending and illegal gambling. In 1998, a 19-year-old youth was arrested for setting up a website dedicated to the society. In 2020, an Ang Soon Tong member was sentenced to reformative probation for clashing with members of another gang.