Xiamen International School participates in the All China and Mongolia International School Conference gold division which consists of 5 other members. Through this association, XIS is provided opportunities to participate in quality international interscholastic sports tournaments along with fine arts, MUN and cultural conventions.

XIS is also a member of the SCISAC (Southern China International Schools Athletic Conference) which consists of XIS and 4 other international schools in HK, Macao, China and Taiwan. Both middle and high school teams compete throughout the year in  self-hosted matches and season ending tournaments. The sports consist of volleyball, soccer, basketball, badminton, swimming and track.