Brett Sontag (born October 29, 1970) is an American professional stock car driver from Joliet, Illinois.

He currently drives the #5 Chevrolet Impala at various midwest racetracks including the Grundy County Speedway in Morris, Illinois, the Illiana Motor Speedway in Schererville, Indiana and at select CRA Super Series, ASA Late Model Series, and ASA Midwest Tour events.

As of 2012, Sontag is tied for most track championships at the Grundy County Speedway with the late Ed Hoffman Sr., each claiming six titles to their name.

[1] Previous winners include Reed Sorenson, David Stremme, Jimmie Johnson, Johnny Benson and Kenny Wallace.

He won the 2008, 2009 and 2010 super late model championships at the Grundy County Speedway in Morris, IL, winning a combined 23 feature events over those three years.