Stoolball is a sport that dates back to at least the 15th century, originating in Sussex, southern England. It is considered a "traditional striking and fielding sport" and may be an ancestor of cricket (a game it resembles in some respects), baseball, softball, and rounders. The sport has been called "cricket in the air". There is evidence to suggest that it was played as a tradition by milkmaids who used their milking stools as a "wicket" and the bittle, or milk bowl as a bat, hence its archaic name of bittle-battle.

The sport of stoolball is strongly associated with Sussex and has been referred to as Sussex's 'national' sport and a Sussex game or pastime. The National Stoolball Association was formed in 1979 to promote and expand stoolball. The game was officially recognised as a sport by the Sports Council in early 2008. The National Stoolball Association changed its name to Stoolball England in 2010 on the advice of the Sports Council and was recognised as the national governing body for stoolball in England in 2011. The organization is recognized by Sport England.

The game's popularity has faded since the 1960s, but continues to be played at a local league level in Sussex, Kent, Surrey and the Midlands. Some variants are played in some schools. Teams can be ladies only or mixed. There are ladies' leagues in Sussex, Surrey and Kent and mixed leagues in Sussex.