Blackburn Olympic F.C. was an English association football club based in Blackburn, Lancashire in the late 19th century. Although the club was only in existence for just over a decade, it is significant in the history of football in England as the first club from the north of the country and the first from a working-class background to win the country's leading competition, the Football Association Challenge Cup (FA Cup).
The club was formed in 1878 and initially took part only in minor local competitions. In 1880, the club entered the FA Cup for the first time, and three years later defeated Old Etonians at Kennington Oval to win the trophy. This victory was a significant factor in the decision by the sport's governing body, The Football Association, to allow professionalism two years later. Olympic, however, proved unable to compete with wealthier and better-supported clubs in the professional era, and folded in 1889.