Free & Low-Cost Clinics in Ontario, CA

8 community health centers · Data from HRSA, refreshed 2026-08-30

These are the 8 community health centers in Ontario. Each one treats patients with or without insurance and charges on a sliding-fee scale based on income. Call ahead to confirm hours, services, and whether you need an appointment.

Clinics in Ontario

• Friends of Family Health Center - 1129 W. 4th Street, Ontario

  1129 W Fourth St, Ontario, CA 91762

  📞 909-363-9300 40 hrs/week Sliding-fee scale

• Ontario

  1556 S Sultana Av, Ontario, CA 91761

  📞 909-630-7927 70 hrs/week Sliding-fee scale

• Ontario Archibald

  2680 E Riverside Dr, Ontario, CA 91761

  📞 909-630-7939 74 hrs/week Sliding-fee scale

• Ontario Health Center

  150 E Holt Blvd, Ontario, CA 91761

  📞 909-458-9447 42 hrs/week Sliding-fee scale

• Ontario Maple Head Start

  555 W Maple St, Ontario, CA 91762

  📞 909-984-4117 4 hrs/week Sliding-fee scale

• Unicare Community Health Center - Ontario 1151

  1151 E Walnut St, Ontario, CA 91761

  📞 909-467-1425 40 hrs/week Sliding-fee scale

• Unicare Community Health Center, Inc.

  437 N Euclid Ave, Ontario, CA 91762

  📞 909-988-2555 40 hrs/week Sliding-fee scale

• Unicare-Ontario HQ expanded

  123 W E St, Ontario, CA 91762

  📞 909-988-2555 40 hrs/week Sliding-fee scale

Other Cities in California

• Los Angeles (294)
• San Diego (98)
• Oakland (84)
• San Francisco (84)
• San Jose (73)
• Fresno (67)
• Sacramento (66)
• Bakersfield (48)

New to community health centers?

• How the sliding-fee scale works — and how to qualify
• What to bring to your first visit
• Getting care with no insurance

Ontario at a Glance

Every clinic listed above is a federally funded community health center — it treats you with or without insurance, regardless of immigration status, and charges on a sliding-fee scale based on income. Here's what the HRSA and federal NPI registry data shows for Ontario specifically:

• 8 of 8 clinics list a direct phone number you can call ahead.
• 5 of 8 clinics list a website.
• 6 of 8 are part of a program that reports dental services in federal UDS data (program-level, not per-site — call to confirm dental is offered at this address).
• Reported weekly hours: 7 clinics report 40+ hrs/week, 1 report under 20 hrs/week.
• Provider types on file with the federal NPI registry for clinics in Ontario: Clinic/Center, Community Health (1). Confirmed only where the registry record's name matches the clinic with high confidence — call to verify what a specific site offers.

Clinic data from the HRSA Health Center Program, refreshed 2026-08-30. Directory information only, not medical advice. View all clinics in California →

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