The 1978 Delaware 500 was a Winston Cup Series (now Nextel Cup) event held at Dover International Speedway on September 17, 1978. Bobby Allison dominated the event, leading 267 of 500 laps in route to a 19.7 second victory on Cale Yarborough. Yarborough, in the meantime, left the event with a 385-point championship lead on Dave Marcis (8th). Stats