Toby (Tobias) Petersen (born October 27, 1978 in Minneapolis, Minnesota) is a professional ice hockey right winger who currently plays for the Dallas Stars of the National Hockey League (NHL). He attended Colorado College, and was drafted by the Pittsburgh Penguins 244th overall in the 9th round of the 1998 NHL Entry Draft.

During Game 3 of the Western Conference Final in the 2005–06 playoffs, Petersen scored his first ever NHL playoff goal against Ilya Bryzgalov of the Anaheim Ducks by stealing the puck and wrapping it into an empty net while Bryzgalov attempted to make a play behind his goal line.

Petersen has stated that he is a type-one diabetic. As a result, he must use his insulin pump during games. The Wilkes-Barre/Scranton Penguins nominated him as their 2003–2004 AHL Man of the Year candidate for his work with Diabetes charities.