1778 in sports

1778 in sports describes the year's events in world sport.

Boxing
Events
 * June — Harry Sellers defeated Bill " The Nailer " Stevens in a 10-minute fight to retain the English Championship title.

Cricket
Events England
 * Thomas Brett, the first great Hambledon bowler, retired from cricket.
 * Most runs – William Yalden 162
 * Most wickets – Lamborn 22

Horse racing
England
 * St Leger Stakes – Hollandoise