Mike Stefanik (born May 20, 1958, in Wilbraham, Massachusetts is a NASCAR driver. He currently races in the Whelen Modified Tour, piloting the #16 Diversified Metals Pontiac. Stefanik was named the second greatest NASCAR Modified driver of all-time in 2003.  His seven series championships are tied with Jerry Cook for second all-time, trailing only Richie Evans. In 2006, Stefanik tied the late Evans with nine overall championships in NASCAR-sanctioned competitions including the unique situation where in 1997 and 1998 where he won both the Modified and Camping World East championships in the same year. He is also the career wins leader of the series with 67.
From 1989 to 1998, Stefanik won four championships in the NASCAR Whelen Modified Tour, and was also an accomplished Busch North driver, winning the 1997 and 1998 titles. In doing so, he became the first driver to win two NASCAR championships in consecutive years; Lee Petty is the only other person to have won two championships in one year. Following these seasons, Stefanik moved up to the Craftsman Truck Series, racing for Dale Phelon and finishing in the top-ten nine times during 1999, achieving Rookie of the Year honors. After that, though, Phelon's team left the series, and Stefanik moved back to the Modified and Busch North tours in 2001. He won three more Modified titles in 2001, 2002 and 2006.