The 2015 STP 500 was a NASCAR Sprint Cup Series race held on March 29, 2015, at Martinsville Speedway in Ridgeway, Virginia. Contested over 500 laps on the 0.526 miles (0.847 km) paperclip shaped short track, it was the sixth race of the 2015 NASCAR Sprint Cup Series season. Denny Hamlin won the race while Brad Keselowski finished runner-up. Joey Logano, Matt Kenseth and David Ragan rounded out the top five.