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Spas & med spas in Ontario, CA

47 spas & med spas listed in Ontario, California. 46 with a phone number and 36 with a website.

Ontario accounts for 0% of the spas & med spas listed in California and ranks #105 among California cities for spas & med spas.

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Quick answer

Ontario, CA has 47 spas & med spas listed on USA Business Search. 46 list a phone number and 36 list a website. The most listings are in ZIP codes 91764, 91762, 91761.

Updated October 2026
Featured · Elevation Health

Thinking about GLP-1 weight loss in Ontario?

Elevation Health is a telehealth GLP-1 program founded by registered dietitians. A clinician reviews your intake and health history, and dietitian coaching is built in.

  • RD-led coaching
  • Clinician review
  • Telehealth, from home
Take the free GLP-1 assessmentHow the program works

Prescription medication is provided only if a licensed provider finds it appropriate.

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How to choose a spa in Ontario

  • Ask who performs medical treatments like injectables or lasers, and their license.
  • Ask for pricing in writing, including packages and memberships.
  • Ask about aftercare and what happens if you have a reaction.

Check the license: Board of Barbering and Cosmetology (estheticians).

Medical weight loss and GLP-1 care in Ontario: what to ask

  • GLP-1 medicines such as semaglutide and tirzepatide are prescription-only. A licensed prescriber should review your health history and any labs.
  • Ask whether the medication is an FDA-approved brand or a compounded version, and which pharmacy fills it.
  • Ask for the full monthly cost in writing: visits, medication, shipping and follow-up.
  • Ask how side effects are monitored and how often you will check in with a clinician or dietitian.

See the medical weight loss guide for providers by state.

Common questions

How many spas & med spas are listed in Ontario, California?

USA Business Search shows 47 spas & med spas in Ontario. 46 list a phone number and 36 list a website.

Which ZIP codes do these listings cover?

They include ZIP codes 91764, 91762, 91761, 92507, 92509.

How do I choose a spa in Ontario?

Ask who performs medical treatments like injectables or lasers, and their license. Ask for pricing in writing, including packages and memberships. Check the license with the Board of Barbering and Cosmetology (estheticians).

How do spas & med spas in Ontario compare with the rest of California?

Ontario has 0% of the 19,348 spas & med spas listed in California, which ranks #105 among California cities for this category.

How do I add or fix a listing?

Listings are free. Use Add your business, or the Claim or fix link on any listing.

Do I need a prescription for GLP-1 weight loss in Ontario?

Yes. Semaglutide and tirzepatide are prescription medications, and a licensed provider decides whether they are appropriate for you. Telehealth programs such as Elevation Health (featured) review your intake from home.

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