Ball bag is a specially designed bag for carrying and storing sports balls such as basketball, soccer, volleyball or rugby. It is commonly used by athletes, coaches and teams for training, games and practices.

Ball bags are usually made of durable mesh or nylon material that is well ventilated to prevent odor and moisture buildup. Ball bags come in a variety of sizes and can hold multiple balls (ranging from one to a dozen), depending on the design. Some ball bags come with drawstrings, zippers or shoulder straps for easy carrying.

The main purpose of a ball bag is to easily and efficiently carry, organize and store sports balls, both on and off the field.