Thiago Teixeira Simon (born April 3, 1990 in Penápolis) is a Brazilian swimmer.

[3][4] At the 2014 José Finkel Trophy in Guaratinguetá, Simon broke the short-course South American record in the 200-metre breaststroke, with a time of 2:04.28.

He also won a gold medal in the 4×200-metre freestyle relay, by participating at heats.

[6][7] At the 2015 World Aquatics Championships in Kazan, Simon finished 29th in the Men's 200 metre breaststroke[8][9] At the 2016 Summer Olympics, he competed in the Men's 200-metre breaststroke, finishing in 36th place overall in the heats.

[10] On 13 September 2016, at the José Finkel Trophy (short-course competition), he broke the South American record in the 200-metre breaststroke, with a time of 2:02.58.