About Planet Fitness Founded in 1992 in Dover, NH, Planet Fitness is one of the largest and fastest-growing franchisors and operators of fitness centers in the world by number of members and locations. As of September 30, 2025, Planet Fitness had approximately 20.7 million members and 2,795 clubs in all 50 states, the District of Columbia, Puerto Rico, Canada, Panama, Mexico, Australia and Spain. The Company's mission is to enhance people's lives by providing a high-quality fitness experience in a welcoming ...