Jacuzzi is a private company that manufactures and markets hot tubs, pools, and other bath products. It is best known for the Jacuzzi hydrotherapy products. Headquartered in Irvine, California, US, it is the largest hot tub manufacturer in Europe and has eight factories, the largest in Italy.

The company was founded in 1915 by seven brothers from the Jacuzzi family. It developed a variety of products including pumps for agricultural use. In 1948, Jacuzzi created water pumps to treat a family member's rheumatoid arthritis. The water pumps were a niche medical product until they were integrated into a recreational hot tub in 1968. As the popularity of hot tubs grew, Jacuzzi created more models that were more advanced. Jacuzzi was family-run until 1979, after which it then changed hands several times, before being bought by its current owner Investindustrial in 2019.

The Associated Press Stylebook lists Jacuzzi is a trademark brand for products like hot tubs, whirlpool spas, and whirlpool baths and it may not be legal to use the name in a commercial context without permission.