Melaine Walker (born 1 March 1983) is a Jamaican 400 metres hurdler.

[1] Walker is a past student of the St. Jago High School.

Competing for the Texas Longhorns women's track and field team, Walker won the 2005 NCAA Division I Outdoor Track and Field Championships in the 4 × 400 m relay.

Walker won the Jamaica national championships in 54.70 seconds, narrowly beating newcomer Kaliese Spencer and qualifying for her first World Championships in Athletics.

[3] On 20 August 2009, she set the second fastest time in history of 52.42 seconds to win the women's 400m hurdles final at the 2009 World Championships in Berlin.