Ontario Boxing Club
“Great gym atmosphere with dedicated coaches ready to train.”
Best Personal Trainers in Ontario, CA
15 trainers listed · 4 in Ontario · 1 open 24/7 · 13 open weekends · 13 rated 4.5+
Data verified October 18, 2026
Frontsight Fitness
“Love this place, everyone treats you like family and they have really amazing events to bless military families all year long.”
Train With Talia Personal Training
“I love coming to the studio everyday for classes and trainings you are doing a great job i love seeing you all the classes and instructors are awesome.”
The Ultimate Warriors Boxing Academy
“It's friendly and they focus on your training”
The Health Factor
Upec Fitness
“The training they provide translates to a variety of sports as well as simply regaining your everyday fitness.”
This page lists 15 personal trainers and training gyms recorded for Ontario, CA. What each one says about its approach, its hours and its booking comes from its own website; ratings and quotes come from public reviews.
Area overview: Ontario, CA
4 of the 15 trainers we list are based in Ontario; the other 11 serve Ontario from towns including Rancho Cucamonga (6 mi), Upland (6 mi) and Corona (13 mi). The trainers on this page are rated from 4.0 to 5.0 across 1,021 reviews; 10 have 50 or more reviews and 13 are rated 4.5 or higher. The topics that come up most in reviews of the trainers on this page are "confidence", "equipment" and "knowledge". 1 is open around the clock; 13 are open on Saturdays and 4 on Sundays. 1 lists staff certifications (ACE and CPR). 6 have ten or more years of experience, the longest 22 years. 1 offers a free trial or consultation and 5 list coupons or special offers. We have a website on file for 14 of the trainers on this page; 10 publish a contact page; 7 list a public email and 4 take bookings online. We count these figures across the trainers on this page; distances are straight-line, and hours and prices change, so confirm the details with the trainer before you enroll.
Can I book a trainer listed for Ontario online?
4 of the 15 listings take online bookings. A first phone call is normal anyway, because a trainer wants to know what they are working with before putting you in a slot.
Fit Gym
“Safe area for a nice local gym to go anytime I want.”
Corona Hills Boxing & Fitness
“If you're looking for a gym where you can connect your phone to the gym speakers, have plenty of space to workout, be around friendly staff and people ...”
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Next Level Sports Massage
“A little discomfort and a lot of laughs and I can now carry my baby without wincing, or hug my husband.”
Crossfit Crowntown
“They were super accommodating, great coaching from Coach Caesar, kept the class timely and structured.”
Fitness Underground
“He also made it his priority to teach me about the different muscle groups and which muscles each workout was geared towards strengthening.”
Awareness Training
“Besides being a go to expert in personal training, Ray is a man of many talents.”
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Crossfit Reverb
“Joining a new box can be a bit stressful but since day one everyone here is super friendly and supportive.”
Wisdom's Fitness
“What I love the most is how they tailor the workouts to the individual's needs and capabilities.”
Crossfit Fortem
“You will always be greeted with a smile here, and they are always encouraging you to reach your fitness goals!”
Why these companies made our list
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