One wall paddleball is an American ball game that consists of hitting a small rubber ball against a single wall by using paddles. It can be played in singles (1 versus 1) or in doubles (2 versus 2). The general rule of the game is that the ball must hit the wall without touching the court floor more than once in order to be a valid rally. The balls are usually black, blue, and green. The paddles were originally made of wood, but they are now primarily made of materials such as graphite and titanium.
The game is popular in places where the weather permits outdoor play such as New York, Florida, New Jersey, Connecticut, California and Puerto Rico, although indoor courts, although rare, exist. Tournaments are ruled by the American Paddleball Association.