About Us

Largest 24/7 Gym in Watertown

 We are a 24 Hour 7 days a week Gym in Watertown, SD.  All fitness levels are welcome at The Gym Inc.  Stop by for a tour during staffed hours, and we are sure you will be surprised at the size of our facility; we are on 17,000 square feet of floor space on 3 levels.   You will never feel crowded or have to wait for machines.

Take online Tour

So Many Amenities

The Gym in Watertown SD has in-body 570 cody composition analyzer available anytime to see progress

We are more than just a gym; you can have a spa experience.  Enjoy FREE 24/7 access to Tanning and  Far Infrared Saunas.

Want More ?  You can add on 24 Hour access to Hydro Massage for your sore muscles and Red Light Therapy to help your skin and joints to create more collagen for a healthier looking skin and easing of joint pain.   

Or try the InBody 570 Body Composition Analyzer to see how much fat vs muscle you are made of. 


Amenities Details

Group Training

At The Gym Inc. in Watertown, SD, the Mind Muscle Motion Group Training with Kettlebell Kim will give you the edge you need to start on your fitness path or to take your fitness to a whole new level.  Using Kettlebells and Suspenstion equipment; you will learn new ways to use equipment to get fit efficiently.   Learn more about Instructor here.

Book your Group Training for the session that works for you.  

Book Online

More About Us

Largest 24 Hour Gym Watertown SD with weight room cardio hydromassage redlight therapy inbody scans

Membership Specials Save NOW!

We have Special Deals on Gym Memberships going on right now!  So act now to Save Money!

We have Senior, Student, Military and Corporate Discounts for large local employers.  We can even set up a special small company deal if you and your fellow employees want to get a group together and join.  Find out more below. 

Specials & Discounts
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Memberships Options

We have many options available, such as no commitment with month to month.   To save some money pick from our longer time plans.

We have Singles, Couples, Families and of course Add on the Amenities if you choose.

Learn About Membership Options
Smoothies, Vitamins, Supplements, Proteins, Sports Nutrition at the Gym Watertown SD

Smoothie Plus & Nutrition Store

The Gym Inc. Members get a DISCOUNT!  But even if you are not a member we are open to the public and our prices are marked below manufacturers suggested retail price. 

More than Smoothies, we have vitamins, proteins and supplements for your health needs.

Come in to get your Pre and Post Workout Drinks & Meal Replacement Nutritional Smoothies.


Not only are Smoothie Plus Smoothies good for you, they taste great too.  

You don’t have to be a Member to visit Smoothie Plus, we are open to the public during staffed hours. 

Find out more

We accept Most Insurance Plans Fitness Benefits


Merry Fitness Challenge

Nov. 26 to Dec. 20, 2018

All day

The Gym Inc.

+ Event Details

Merry Fitness Challenge

Nov. 26 to Dec. 20, 2018

Members Only!  Workout to earn Christmas Ornaments to hang on our tree. The more ornaments you earn the more chances to win prizes in our Merry Fitness Challenge Drawing on Dec. 20, 2018

See Staff for all the details

All day

The Gym Inc.

Christmas Open House & Last Minute Gift Giving Grab

Thursday Evening Dec. 20, 2018

4:00 pm - 7:00 pm

The Gym Inc.

+ Event Details

Christmas Open House & Last Minute Gift Giving Grab

Thursday Evening Dec. 20, 2018

Do you still need last minute gifts?

Are you wanting to get a head start on that New Years Resolution?

Stop by for a tour and pick up gift certificates for Gym Memberships and Products from Smoothie Plus.  It will be a welcome gift when you give gift certificates from The Gym Inc. 

Drawing for the Merry Fitness Winners will be at 6:30pm

4:00 pm - 7:00 pm

The Gym Inc.

207 E Kemp Ave. Watertown, SD

24/7 Member Access - Guest Inquiries During Staffed Hours

See Google Map CLICK HERE

 Our Staff would love to show you around, so feel free to visit during staffed hours. 

The Gym Inc.

207 East Kemp Avenue, Watertown, South Dakota 57201, United States

(605) 753-5600

Staffed Hours to visit for Inquiries & Day Passes


10:00 am – 7:00 pm


10:00 am – 7:00 pm


10:00 am – 7:00 pm


10:00 am – 7:00 pm


10:00 am – 5:00 pm


10:00 am – 1:00 pm


By Appointment

Access is 24 Hours-7 Days a Week for Members.  Non-Members can visit during Staffed Hours only. 

Contact Us

Better yet, see us in person!

We love visitors, so feel free to stop by during Staffed hours listed above.  CLICK HERE FOR GOOGLE MAP

The Gym Inc.

(605) 753-5600

Drop us a line!