Yeo Kian Chai (born 2 November 1943) is a Singaporean sprinter. He competed in the men's 100 metres and the 200 metres at the 1972 Summer Olympics.^[1]

Yeo competed in the men's 4x100 m relay at the 1967 Southeast Asian Peninsular Games (SEAP Games) and won a silver medal.^[2] In the 1969 SEAP Games, he competed in the same event and won a bronze medal.^[2]

In 1970, Yeo competed in the men's 100 metres and the 200 meters at the British Commonwealth Games.^[3][4] At the 1971 SEAP Games, Yeo won the silver medals for both the men's 100 m and men's 4x100 m relay.^[2] He won bronze medals for the men's 200 m and the men's 4x100 m relay.^[2]

In 1972, Yeo competed in the men's 100 and 200 metres at the 1972 Summer Olympics and did not qualify out of his heats.^[1] At the 1973 SEAP Games, Yeo won the silver medal for the men's 100 m.^[2] At the 1975 SEAP Games, Yeo continued to win the silver medal for the men's 100 m and also the silver medal in the men's 4x100 m relay.^[2]