St. Mark's International School (Thai: โรงเรียนนานาชาติเซนต์มาร์ค, RTGS: Rong Rian Nana Chat Sen Mak) is an international Australian school located in Suan Luang District, Bangkok. It is a Christian school and a member of Association of Christian Schools International (ACSI). It was established in 1999 as the first Australian international school in Thailand. The school caters for students from Kindergarten to Year 12. Students come from a range of countries including Australia, England, New Zealand, the US, India, Singapore, Brazil, China, Japan and Thailand.