Noh Si-hwan (Korean: 노시환; born 6 September 1992) is a male South Korean long-distance runner.

He competed in the marathon event at the 2015 World Championships in Athletics in Beijing, China.

[1] At the 2015 World Championships, Noh was 39 seconds behind the leader until the 20 km mark, but gradually fell back after that.

He was considered "the next generation of Korean marathon runners" by Korean media.

This biographical article relating to South Korean athletics is a stub.