Marek Niit (born 9 August 1987, in Kuressaare) is a sprinter from Estonia who won gold medal at the 200 metres at the 2006 World Junior Championships in Athletics in Beijing, China.

He is also the current national record holder in 100 metres, 200 meters and 400 meters.

Competing for the Arkansas Razorbacks track and field team, Niit won the 2012 and 2013 4 × 400 meter relay at the NCAA Division I Indoor Track and Field Championships.

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