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Serving The Jacksonville Community Since 1981 Under Same Ownership and Management


Check out our wide variety of group fitness classes for those of all ages and experience levels. With low impact classes like yoga, and full body workout classes like BodyPump you are sure to find a perfect fit!


No babysitter? No problem! With our Free Onsite childcare, your child will have a safe and secure environment in which to play and participate in fun games that are age appropriate.


Need a bit of extra motivation? Looking for some guidance on your workout plan? Take advantage of our personal training options to help you reach all your fitness goals.


Did you know that just half an hour of cardiovascular exercise four days a week can vastly improve your health and mood? Onslow Fitness’s Jacksonville health club has cardio training options for everyone.


Onslow fitness offers specialized low impact classes for seniors and those recovering from injury. These classes focus on range of motion, balance and stability, and overall movement.


Not only is our pool heated, but it is also salt water. Take advantage of the therapeutic qualities to not only help relieve those aches and pains, but also maintain your fitness regimen.

Serving the Jacksonville Community since 1981!

Welcome to Onslow Fitness, the premier gym in Jacksonville. Here you’ll find a comprehensive selection of equipment, state-of-the-art workout facilities, specialized amenities, and a friendly, family-like atmosphere.

The mission of our Jacksonville gym is to help you achieve real results with your fitness program – and to enjoy yourself in the process! We provide the best exercise machines out there, expert trainers, group exercise options, convenient fitness tracking, therapeutic post-workout care, and special little things like free onsite childcare, a heated indoor pool, and fully equipped locker rooms. We want to make sure your experience at our gym is convenient and comfortable, and we don’t want anything to get in between you and your fitness goals!

Jacksonville’s best gym considers the fitness needs and preferences of every member. Whether you enjoy working out on your own, with a personal trainer, or with the dynamic energy of small group training and group fitness classes, we have it.  From the high intensity of Les Mills group classes to the lower impact workouts of water fitness and Silver Sneakers for seniors, our health club provides opportunities for every age and every stage of fitness.

Our many membership plans make most of our amenities available at one affordable price. Stop by Onslow Fitness today and explore everything we have to offer. We’d be happy to give you a tour and introduce you to our services. You can also try us out with a free 3 day VIP pass and a free class pass!