🏋️ Official Rankings
10 Best Gyms in Ontario, CA (September 2026)
We compared 10 gyms serving Ontario and San Bernardino County, California, and ranked the top providers by verified reviews, ratings, and local reputation — 5,366 customer reviews in all.
The 10 listed below hold an average rating of 4.7 out of 5, led by APE ARENA. Updated for September 2026.
- Gyms ranked
- 10
- Average rating
- 4.7★
- Reviews analyzed
- 5,366
- Area code
- 909
#1
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#5
⭐ 4.6 · 1409 reviews
2580 S Archibald Ave, Ontario, CA 91761
#6
⭐ 4.6 · 1166 reviews
9080 Foothill Blvd, Rancho Cucamonga, CA 91730
#7
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Gyms listed here serve Ontario, San Bernardino County, and nearby ZIP codes including 91758, 91761, 91762, 91764, 91798.