Daniel O'Quinn Jr. (born May 7, 1985 in Coeburn, Virginia) is an American professional racer from Coeburn, Virginia. Now retired, he competed in the NASCAR Nationwide Series and was a winner of the Roush Racing: Driver X competition.

O'Quinn began racing go-karts at the age of 7 and won four championships. He won over 130 races, and one Tennessee state championship between 1992 and 1998.

In 1999 he became the Street Stock rookie of the year at Lonesome Pine Raceway. He moved up to a late model car in 2000 and won the track championship and the Rookie of the Year award. In 2001, he raced both at Lonesome Pine and the ARA series. He had three wins and four poles. He also attended the University of Virginia's College at Wise in 2003–2005 but put his collegiate pursuits on hold as his professional racing career took off.

In 2002, he won the UARA late model touring series national championship.

Quinn moved up to the USAR Hooters Pro Cup (Southern Series) in 2003, and became the Southern Series Rookie of the Year. In 2004, he won the Food City 250 at his home race track of Lonesome Pine Raceway in Coeburn, Virginia. He became the youngest driver to win in series history and finished seventh overall in points. In 2005, he had six starts in the ARCA series and three sixth-place finishes.

In the fall of 2005, O'Quinn was a contestant on Roush Racing: Driver X. He was ultimately runner-up in the competition, but skipped the Craftsman Truck Series and proceeded directly to the Busch Series with Driver X winner Erik Darnell being inked to the Roush truck contract.

In 2006, he raced the World Financial Group No. 50 Ford in the Busch Series. He got his first Top-10 finish at Nashville Superspeedway after starting second, and followed it up with Top-10's at Milwaukee, ORP, Memphis and Charlotte, where he scored a career best finish of 5th. O'Quinn was named Busch Series Rookie of the Year after the 2006 Season Finale at Homestead-Miami Speedway beating former NASCAR Winston Cup driver John Andretti and teammate Todd Kluever, among others, for the award. In 2007, O'Quinn made occasional starts in No. 17 Dish Network Ford and also ran part-time with Mac Hill Motorsports in the No. 56 Chevy.

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