Una pelota es una bola circular utilizada en deportes de pelota y otros juegos. Las pelotas normalmente son esféricas, pero pueden poseer formas diferentes, como las pelotas de rugby o las de fútbol americano. Las hay elásticas y livianas, como las de fútbol y rugby, que se inflan con aire. Otras son rígidas y pesadas, como las de golf y hockey sobre hielo. A la pelota de tamaño considerable se le llama balón. En la mayoría de los juegos en que se emplean pelotas, el objetivo del juego consiste en manipular la pelota con partes del cuerpo o con alguna herramienta, e introducirla en un área de meta, que varía según cada juego.

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A ball is a round object (usually spherical but sometimes ovoid) with various uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch, marbles and juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings. Black-powder weapons use stone and metal balls as projectiles. Although many types of balls are today made from rubber, this form was unknown outside the Americas until after the voyages of Columbus. The Spanish were the first Europeans to see bouncing rubber balls (albeit solid and not inflated) which were employed most notably in the Mesoamerican ballgame. Balls used in various sports in other parts of the world prior to Columbus were made from other materials such as animal bladders or skins, stuffed with various materials. As balls are one of the most familiar spherical objects to humans, the word "ball" is used to refer to, or to describe, anything spherical or near-spherical.

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