The following NASCAR national series were held in 2003:
Kerry Dale Earnhardt is a former NASCAR driver and the eldest son of seven-time NASCAR Cup Series champion Dale Earnhardt. He is the half-brother of former NASCAR Cup Series driver Dale Earnhardt Jr. and Kelley Earnhardt Miller. He was employed by Dale Earnhardt, Inc. as a consultant specializing in driver development until 2011. His younger son, Jeffrey Earnhardt, began racing for DEI in 2007 and currently competes in the NASCAR Xfinity Series. Kerry Earnhardt is known for his physical similarity to his father.
Kyle Eugene Petty is an American former stock car racing driver and current racing commentator. He is the son of racer Richard Petty, grandson of racer Lee Petty, and father of racer Adam Petty, who was killed in a crash during practice in May 2000. Petty last drove the No. 45 Dodge Charger for Petty Enterprises, where he formerly served as CEO; his last race was in 2008.
Jason Charles Leffler was an American professional open-wheel and stock car racing driver. Leffler began racing in the open-wheel ranks, competing in the 2000 Indianapolis 500 before moving to primarily NASCAR competition. He died from injuries sustained in a 410 sprint car race at Bridgeport Speedway in Bridgeport, New Jersey.
Russell Scott Riggs is an American former professional stock car racing driver. He last competed in the No. 92 for RBR Enterprises in the NASCAR Camping World Truck Series.
Kenny Bräck is a Swedish former race car driver. Until his retirement from racing, he competed in the CART, Indy Racing League and the IROC series. He won the 1998 Indy Racing League championship and the 1999 Indianapolis 500, becoming the first Swedish driver to win the race.
John Paul Christian Menard is an American semi-retired professional stock car racing driver who last competed part-time in the NASCAR Camping World Truck Series, driving the No. 66 Toyota Tundra for ThorSport Racing.
Stephen Brian Park is an American former professional stock car racing driver. He won races in NASCAR's two top Northeast touring series and all three national divisions. Park was born in East Northport, New York as the youngest of four sons.
Derrike Wayne Cope is an American professional stock car racing driver and team owner. He is best known for his surprise win in the 1990 Daytona 500. He last competed in the NASCAR Cup Series, driving the No. 15 Chevrolet Camaro ZL1 for Rick Ware Racing in an alliance with his own StarCom Racing. Cope also served as team manager of StarCom. As of 2022, he is the last driver to compete in at least one NASCAR Cup Series race in five consecutive decades.
Timothy Sauter is an American race car driver. He has competed in the American Speed Association, the NASCAR Craftsman Truck Series, the Busch Series, and the Winston Cup Series. He is the son of Jim Sauter, and the brother of NASCAR drivers Jay and Johnny Sauter.
James Harvey Hylton was an American stock car racing driver. He was a two-time winner in NASCAR Winston Cup Series competition and was a long-time competitor in the ARCA Racing Series. Hylton finished second in points in NASCAR's top series three times. He holds the record for highest points finish by a rookie.
Timothy Fedewa is an American professional racing driver and spotter. He works for Team Penske as the spotter for Ryan Blaney's No. 12 Ford Mustang in the NASCAR Cup Series.
Donnie Neuenberger is a former American professional stock car racing driver.
David Leon Starr is an American professional stock car racing driver. He competes part-time in the NASCAR Cup Series and NASCAR Xfinity Series, driving the No. 66 Ford Mustang/Chevrolet Camaro for MBM Motorsports. He has also raced in the Camping World Truck Series, where he is a four-time race winner.
Jason Patrick Schuler is an American former stock car racing driver. He competed in the NASCAR Busch Series from 2000 to 2004. He is currently building cars for JJ Fabrication, Inc., the company he owns and operates along with Joe Wood in Sun Prairie, Wisconsin.
Jennifer Jo Cobb is an American professional stock car racing driver and team owner. She competes part-time in the NASCAR Craftsman Truck Series, driving the No. 10 truck for her own team, Jennifer Jo Cobb Racing. She has also previously competed in the NASCAR Xfinity Series, ARCA Menards Series and the NASCAR Whelen Euro Series.
Ryan James Ellis is an American professional stock car racing driver. He competes full-time in the NASCAR Xfinity Series, driving the No. 43 Chevrolet Camaro for Alpha Prime Racing. He has also competed in the NASCAR Cup Series and NASCAR Craftsman Truck Series in the past.
The following NASCAR national series were held in 2012:
Jason Rudd is an American former professional stock car racing driver. Last racing for Means Racing in the NASCAR Busch Series, Rudd never ran a full-time season. He is the nephew of former NASCAR Cup Series driver Ricky Rudd.
Jerick Johnson is an American professional stock car racing driver. He has made starts in the NASCAR Xfinity Series, Truck Series, ARCA Menards Series, and the East and West Series. He competed in all of these series between 2003 and 2011.