Nicolas Thomann (born 29 November 1972) is a former professional tennis player from France.

[1] Thomann was a quarter-finalist in the 2000 Davidoff Swiss Indoors, beating top 50 players Nicolas Escudé and Nicolás Lapentti en route.

[2] He lost his singles match in five sets to Jan Frode Andersen and also exited in the first round of the doubles, partnering Jérôme Golmard.

[2] The Frenchman lost to Thomas Enqvist in the opening round of 2002 Australian Open but reached the second round in the 2002 Wimbledon Championships, with a win against Markus Hipfl, won 11–9 in the fifth set.

[2] He reached the semi-finals at the 2003 RCA Championships, held in Indianapolis and also made the quarter-finals of the Thailand Open that year.