Marcus Koh is a Singaporean yo-yo performer and competitor born in 1993. He won the world championships in the 1A division in 2011. He has been sponsored by the yo-yo companies Turning Point and Auldey. In 2015, he started his own company, called Throw Revolution.
Koh started playing with yo-yos in 2003 when he was 10 years old, inspired by the TV cartoon "Super Yo-yo". Koh won the national title in the 1A division in Singapore in 2009. He won the world title in the 1A division on August 6, 2011.