Teo Kok Siang (born 26 August 1990) is a former Malaysian badminton player.

[2] In 2008, he won the gold medals at the Asian and World Junior Championships in the boys' doubles partnered with Mak Hee Chun.

[3] In 2013, he reach the semi-final round at the Southeast Asian Games partnered with Goh V Shem but was defeated by the Indonesian pair, and they settled for bronze.

[4] In 2015, he submitted his resignation letters to the Badminton Association of Malaysia (BAM), and started to play as an independent player.

[5] He started coaching independent players; Goh Soon Huat and Shevon Jemie Lai in January 2023.