Planet Fitness Share: Fitness Planet Fitness Visit Website 6001 Gordon Dr Sioux City, IA 51106 (315) 326-3354 Facebook About Map About Planet Fitness is known for a lot of things - our low prices, our Lunk Alarm, and of course, our Judgement Free Zone®. We're not a gym. We're Planet Fitness. What's Nearby? Distance: 5 10 15 20 25 50 mi.