Gyms in Ontario
The most complete and owner-verified listings first — hours, phone, website, services. No pay-to-play.
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24 Hour Fitness
2580 S. Archibald Avenue, Ontario, CA 91761
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Sweat It Out! Fitness
111 N Euclid Ave, Ontario, CA 91762
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Sixth Sense Gym
790 Ferrari, Ontario, CA 91764-5009
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Crossfit Lifted
1500 S Milliken Ave, Ontario, CA 91761-2314
Of the 4 gyms listed in Ontario, 4 give a phone number and 4 have a website. The nearest bigger selection is Rancho Cucamonga with 13.
Gyms in Ontario by feature
Guides for gym shoppers
All guides
OwningBeginner Gym Workout Guide: Simple Routines and Step-by-Step Plans
Learn how to build a balanced training schedule, master foundational movements safely, and establish a sustainable gym habit from your very first session.
MoneyEquinox Membership Cost Breakdown and Pricing Guide
This guide breaks down typical monthly dues, access tiers, and hidden fees to help you decide if luxury gym pricing fits your lifestyle and budget.
MoneyPlanet Fitness Membership Pricing and Day Pass Guide
Get a clear breakdown of base rates, Black Card upgrades, day pass fees, and annual club charges before signing up.
California statewide, by feature
- Gyms with Group Classes in California832
- Gyms with a Sauna in California761
- 24-Hour Gyms in California695
- No-Contract Gyms in California695
- Gyms with a Pool in California600
- Gyms Offering Flexible Membership Plans in California487
- Gyms with Childcare in California461
- Gyms with Transparent Membership Plans in California454
- 24-Hour Gyms with Round-the-Clock Access in California446
- Gyms with Group Fitness Classes in California434
- Orangetheory Fitness Studios and Group Classes in California130
- Gyms and Fitness Clubs with Red Light Therapy in California103
Nearby in California
Good to know about gyms in Ontario
How many gyms are there in Ontario?
We list 4 gyms in Ontario with addresses, and 4 of them with a phone number.
What's the surest way to check hours in Ontario?
Call ahead — 4 of the 4 gyms here list a number. Hours at independent gyms shift with seasons and staffing, so a phone call beats any listing, including ours.
Is anything open 24 hours in Ontario?
2 of 4 run around the clock.
How much does a fitness trainer cost?
A fitness trainer typically costs between $40 and $100 per hour depending on location and experience. In Ontario, California, you can explore 4 options (4 with direct phone numbers) on GymFinderAtlas to compare local rates. Working with a certified professional ensures proper form and steady progress.