Home › Top 6 Fitness and Gym in Belleville, Illinois Find best Fitness and Gym in Belleville, Illinois, with all necessary contact information, including addresses, phone numbers, working hours, map locations, and website links. Downtown Belleville YMCA - Kern Center US, Belleville, IL 62220200 S Illinois St Club Fitness - Belleville US, Belleville, IL 6222120 Carlyle Plaza Dr Tucker Athletic Performance US, Belleville, IL 622202346 Mascoutah Ave Crossfit Nucleus US, Belleville, IL 62226350 Old Fullerton Rd East Belleville YMCA US, Belleville, IL 622212627 Carlyle Ave Crossfit MetroEast US, Belleville, IL 622201925 S Illinois St #2825