Knoxville Nationals
| Venue | Knoxville Raceway |
|---|---|
| Location | Knoxville, Iowa |
| Corporate sponsor | NOS Energy Drink | Casey's General Stores |
| First race | 1961 |
| Distance | 25 mi (40 km) |
| Laps | 50 |
| Previous names | Super Modified National Championship (1961–1974) Super Sprint National Championship (1975–1976) National Sprint Car Championships (1977) Knoxville Nationals (1978–1982, 1984, 1986–1990, 1994) Coors Knoxville Nationals (1983) Silver Anniversary Knoxville Nationals (1985) NAPA Knoxville Nationals (1991–1993) Amoco Knoxville Nationals (1995–2000) Amoco Ultimate Knoxville Nationals (2001) Mopar Parts Knoxville Nationals (2002) Ford Dealers of Iowa Knoxville Nationals (2003) Knoxville Nationals presented by Midwest Ford Dealers (2004–2005) Knoxville Nationals presented by Super Clean, Midwest Ford Dealers and Hoosier Racing Tires (2006) Super Clean Knoxville Nationals (2007–2009) Goodyear Knoxville Nationals presented by Lucas Oil (2010) Goodyear Knoxville Nationals (2011–2012) FVP Knoxville Nationals (2013–2015) 5-hour ENERGY Knoxville Nationals presented by Casey's General Stores (2016–2018) NOS Energy Drink Knoxville Nationals presented by Casey's General Stores (2019, 2021–present) |
| Most wins (driver) | Steve Kinser(12) |
| Circuit information | |
| Surface | Dirt | Black Iowa soil (zook clay) |
| Length | 0.5 mi (0.80 km) |
| Turns | 4 |
The Knoxville Nationals, known as the NOS Energy Drink Knoxville Nationals presented by Casey's General Store, is an annual sprint car event held at Knoxville Raceway in Knoxville, Iowa. The race is nicknamed "The Granddaddy of Them All." The event is the biggest and most prestigious race of the year in sprint car racing. The Saturday finale is held on the second Saturday in August. The event is held for four days (Wednesday-Saturday) and is attended annually by approximately 25,000 fans. The event has the highest paying purse in sprint car racing at $1,000,000 which attracts roughly 100 race teams to compete.
An Associated Press writer called winning the event "sprint car racing’s premiere title". Ryan Timms is the defending race winner, having won it in 2025.