Simon Trummer (born 8 June 1989 in Frutigen, Canton of Bern) is a racing driver from Switzerland.
Trummer began his motorsport career in karting back in 2003, finishing second in the Swiss Junior Championship. He also finished 21st in the Andrea Margutti Trophy ICA Junior class, he moved up to single-seaters in 2006, competing in Formula Lista Junior. He finished eighteenth overall in the championship with ten points.
Trummer joined the BMS Böhlen Motorsport team in 2007, to compete in the Formule Renault 2.0 Suisse championship. He wasn't so successful in this series, winding up seventh in the championship. Trummer switched teams, joining Jenzer Motorsport for 2008 and finished the season as runner-up.
Trummer stepped up to the new GP3 Series with Jenzer Motorsport in 2010.