List of Clinics in Ontario
Ontario, California, has 152 clinics in this dataset, last verified September 6, 2026. Among the 85 California cities we track, it ranks 46th, between San Bernardino (153) and Palo Alto (150). Local listings make up 0.6% of all clinics in California.
26 clinics in Ontario list both a phone number and an email address, the best starting point for multi-channel outreach. Email coverage is below the California average, 17.1% against 22.6%, so expect phone (96.7% coverage) to do most of the work.
71.7% of clinics in Ontario have a website (in line with 75.6% across California), which leaves 43 local prospects for web design and Google Business Profile services. 16 of their websites list a contact page URL.
48% of the 112 rated clinics in Ontario hold a 5-star average, below the California figure of 53%. The 15 rated 1 to 2 stars are the obvious first calls for a reputation management pitch.
Social Media Reach
42
41
28
30
YouTube
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Clinics List in Ontario
Browse a random sample of 15 records — see the exact fields and data quality before you download.
| LOGO | Business Name | Address | City | State | Country | Phone | Website | Reviews | Rating | FB | IG | LI | YT | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Azar Foot & Ankle Specialist - Ontario | Address | Ontario | California | United States | Email | Phone | 9 | 4.1 | — | — | — | — | ||
 | Chandler Health PC | Address | Ontario | Oregon | United States | Email | Phone | 0 | 0 | — | — | — | — | ||
Dr. Jimmy Bhatt | Address | Ontario | California | United States | Email | Phone | — | 1 | 5 | — | — | — | — | ||
 | Healthpointe Ontario | Address | Ontario | California | United States | Email | Phone | 924 | 4.3 | — | — | — | — | ||
Fortner Medical Clinic | Address | Ontario | Oregon | United States | Email | Phone | — | 0 | 0 | — | — | — | — | ||
 | KW Health System, Inc. | Address | Ontario | New York | United States | Email | Phone | — | 0 | 0 | — | — | — | — | |
OHSU Doernbecher Pediatrics, Ontario | Address | Ontario | Oregon | United States | Email | Phone | 0 | 0 | |||||||
 | Christopher L. Gehrisch, DC | Address | Ontario | Ohio | United States | Email | Phone | — | 4 | 5 | — | — | — | — | |
 | DaVita Four Rivers Dialysis Center | Address | Ontario | Oregon | United States | Email | Phone | 4 | 4.8 | — | — | — | — | ||
 | Iris Psychiatry | Address | Ontario | Oregon | United States | Email | Phone | 2 | 5 | — | — | — | |||
 | Eric Tsai Acupuncture & Herbs | Address | Ontario | California | United States | Email | Phone | 19 | 4.9 | — | — | — | — | ||
 | Right Bite Dentures | Address | Ontario | Oregon | United States | Email | Phone | 248 | 4.9 | — | — | — | — | ||
 | Ontario Medical Spine and Joint | Address | Ontario | Ohio | United States | Email | Phone | — | 10 | 5 | — | — | — | — | |
 | TRAC - Physical Therapy & Sports Medicine Center | Address | Ontario | California | United States | Email | Phone | 2 | 5 | — | — | — | — | ||
 | Kaiser Permanente Ontario Medical Center | Address | Ontario | California | United States | Email | Phone | 1645 | 4.4 |
This is a randomized preview — the full database contains 152 records with complete field coverage.
Get the full Clinics database
152 verified records — emails, phones, social profiles and more. One-time payment, instant download.
Top business categories in Ontario
Most popular business categories across Ontario
Category | Clinics |
|---|---|
What You Can Do with the List of Clinics in Ontario
This list is built for teams that sell to clinics: medical supply distributors, practice software vendors, billing services and healthcare staffing agencies. It covers 152 clinics in Ontario, with the fields to call, email, segment and map them.
Who Sells to Clinics in Ontario, California
Each of these buyers can work the 152 businesses in this list as a pipeline for a different product:
- Medical and dental supply distributors: Open accounts with the 152 clinics in Ontario for consumables, instruments and equipment.
- Practice management and EHR software: Pitch scheduling, patient records and billing systems to independent practices.
- Medical billing and credentialing services: Offer to take claims, coding and payer enrollment off the front desk.
- Healthcare staffing agencies: Place nurses, medical assistants and front-office staff.
Phone, Facebook and Email Outreach in Ontario, California
Start with the 26 records that list both a phone number and an email address, then widen out channel by channel:
- Cold calling (147): 96.7% of records include a phone number for call campaigns, appointment setting and follow-ups.
- Facebook messages (42): 27.6% have a Facebook page, a further channel when calls and emails go unanswered.
- Email sequences (26): 17.1% of records include an email address, so use email as a follow-up touch rather than the lead channel.
- CRM import: CSV and Excel files load into HubSpot, Salesforce, Zoho or Pipedrive, with city, state and postal code columns for assigning leads to reps.
Prospect Segments for Agencies in Ontario, California
Filter the website, rating and social columns to pull the clinics that fit a specific service before you pitch:
- No website listed (43): 28% of clinics in Ontario have no website on record, a direct prospect list for web designers and local SEO agencies.
- Rated 1 to 2 stars (15): businesses with poor Google ratings, prospects for reputation management and review generation services.
- No Facebook page (110): 72% have no Facebook page on record, an opening for social media management agencies.
Local Coverage Plan for Ontario
With 152 clinics in one city, local teams can work the list in person as well as by phone:
- Route planning: records include latitude and longitude, so field reps can map all 152 clinics in Ontario and plan visit days by neighborhood.
- Postal code patches: split Ontario by postal code to divide accounts between reps or focus on specific parts of town.
- Next markets: the 84 other California cities we track are the next step once Ontario accounts are covered.
Data Coverage for Clinics in Ontario
152 records · verified September 6, 2026
- Phone numbers
- 147
- Email addresses
- 26
- Phone and email
- 26
- Websites
- 109
Google ratings· 112 rated (74%)
48% hold 5 stars
- 1-star rated
- 7
- 6.3% of rated
- 2-star rated
- 8
- 7.1% of rated
- 3-star rated
- 23
- 20.5% of rated
- 4-star rated
- 20
- 17.9% of rated
- 5-star rated
- 54
- 48.2% of rated
Social profiles:
- Facebook:42· 27.6%
- Instagram:41· 27%
- YouTube:30· 19.7%
- X (Twitter):29· 19.1%
- LinkedIn:28· 18.4%
Clinics in Ontario are a phone-first, Facebook-heavy market: 96.7% list a phone number but only 17.1% publish an email. Among 112 rated clinics, 48% hold 5 stars, a more even spread, so ratings separate businesses meaningfully.
Related Clinics by Location
Browse datasets for Clinics across nearby locations
Frequently asked questions about Clinics in Ontario, California
Everything you need to know about our clinics database for Ontario, California: data quality, coverage, freshness, pricing, and formats. Last updated September 6, 2026.
How many Clinics are there in Ontario, California?
There are 152 clinics in Ontario, California in our verified database, as of September 6, 2026.
This covers independent operators, regional chains, and enterprise-scale businesses, giving you the complete Ontario market for sales prospecting and territory planning.
How up to date is the Clinics data for Ontario, California?
This dataset was last updated in September 6, 2026.
Business contact data decays at roughly 2–3% per month as businesses close, move, or change details, so we re-verify our most-purchased datasets on a rolling basis.
Every file is also run through email verification before delivery, and past buyers are offered discounted refreshed versions as updates ship.
What fields are included in the Clinics database for Ontario, California?
Each record can include: business name, full address, phone number, email address, website URL, social profiles (LinkedIn, Facebook, Instagram, YouTube, X), review ratings, and category details, plus contact-page URLs where available.
Field coverage varies by record; the counts below and the free sample show you exactly what to expect before buying.
Where can I buy verified market intelligence data for Clinics businesses in Ontario, California?
InfiniteLeadsHub provides verified market intelligence datasets for clinics businesses in Ontario, California as a one-time purchase with no subscription.
Ideal for market research, sales planning, and business development.
How much does the Clinics database for Ontario, California cost?
The complete clinics leads database for Ontario, California costs $10 as a one-time payment.
You get instant access to all 152 records with no recurring fees, no per-record charges, and no seat limits.
It is a cost-effective alternative to subscription platforms that charge monthly for the same public business data.
Is this a cheaper alternative to subscription lead databases like ZoomInfo or Apollo?
Yes. For teams that need clinics contacts in Ontario, California specifically, a one-time $10 file is usually far cheaper than subscription platforms, which typically charge thousands of dollars per year with contracts and per-seat pricing.
Subscriptions make sense for large sales teams needing continuous multi-industry access; a one-time targeted list makes sense when you know exactly which niche and geography you're selling into.
Can I preview a sample of the Clinics data before buying?
Yes. A free sample dataset is available so you can evaluate data quality, field coverage, and format before purchasing.
The sample is a representative slice of the full Ontario, California clinics database, including contact fields, social profiles, and ratings data.
How do I download the Clinics list, and what file formats are available?
You get instant access after purchase. Files are delivered in CSV and Excel (XLSX) formats.
CSV and Excel import directly into CRMs like Salesforce, HubSpot, and Zoho and into any email platform.
How many Clinics in Ontario, California have phone numbers?
147 clinics in Ontario, California (97% of the database) include a phone number.
That makes the dataset effective for cold calling, telemarketing, and appointment setting campaigns.
How many Clinics in Ontario, California have email addresses?
26 clinics in Ontario, California (17%) include an email address.
Email remains one of the highest-ROI B2B outreach channels, making this subset ideal for cold email sequences, product announcements, and drip campaigns.
How many Clinics in Ontario, California have both a phone number and an email address?
26 clinics in Ontario, California have both a phone number and an email address.
Dual-contact records enable multi-channel outreach: combining calls with email follow-ups measurably improves response rates.
How many Clinics in Ontario, California are active on social media?
Social profile coverage for clinics in Ontario, California: 28 on LinkedIn, 42 on Facebook, 41 on Instagram, 30 on YouTube, 29 on X (Twitter).
Social presence signals digitally engaged businesses, which is useful for agencies pitching social media services, ad platforms building audiences, and vendors targeting digitally mature prospects.
How many Clinics in Ontario, California have a website?
109 clinics in Ontario, California (72%) have an active business website.
That is an indicator of digital maturity, and an ideal segment for SEO agencies, hosting providers, and SaaS platforms.
How many Clinics in Ontario, California do not have a website?
43 clinics in Ontario, California operate without a business website.
These are high-intent, overlooked prospects for web design agencies, local SEO providers, and Google Business optimization services.
What are the review ratings of Clinics in Ontario, California?
Rating breakdown for clinics in Ontario, California: 54 with a 5-star rating, 20 with a 4-star rating, 23 with a 3-star rating, 8 with a 2-star rating, 7 with a 1-star rating.
Top-rated businesses suit premium services and partnership proposals; lower-rated businesses are receptive prospects for reputation management, review tools, and operational software.
Can I get Clinics data for all of California or the entire US?
Yes. Beyond Ontario, we offer the complete Clinics database for California and a national all-50-states version.
If you buy the Ontario list first, contact us and we'll credit your purchase toward the state or national upgrade.
Is the Clinics contact data in Ontario, California legal to use for B2B outreach?
Yes. All data is sourced exclusively from publicly available information: Google Business listings, company websites, social media profiles, and public business directories.
This is business contact information, not personal consumer data, making it appropriate for B2B prospecting.
We recommend following applicable regulations such as CAN-SPAM (US), CASL (Canada), and GDPR (EU-targeted campaigns) so your outreach remains fully compliant.