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The 100 largest healthcare providers in Ontario

Tamtam tracks 131 healthcare providers headquartered in Ontario. This list ranks the 100 largest by number of employees on LinkedIn, led by Shoppers Drug Mart, Loblaw Companies Limited and University Health Network. Their median headcount is 1,879. Half of them were founded in 1968 or later. The most common headquarters are Toronto (30), Ottawa (12) and Markham (6).

🇨🇦 Ontario100 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Shoppers Drug Martshoppersdrugmart.ca

National chain of pharmacies across Canada, emphasizing professional expertise and personalized service in meeting customers' health care needs for over 50 years

Retail 🇨🇦 Toronto 33,036 n/a
2
Loblaw Companies Limitedloblaw.ca

Largest Canadian retailer offering grocery, pharmacy, health, beauty, financial services, apparel, and recognized brands like President’s Choice and no name.

Retail 🇨🇦 Brampton 24,123 n/a
3
University Health Networkuhn.ca

Largest Canadian research hospital network specializing in patient care, medical research, education, and fundraising for advanced healthcare services.

Hospitals and Health Care 🇨🇦 Toronto 11,930 n/a
4
City of Ottawa / Ville d’Ottawajobs-emplois.ottawa.ca

A diverse workforce providing essential programs and services for over one million residents in Ottawa, with a focus on customer service and community well-being

Government Administration 🇨🇦 Ottawa 9,194 1855
5
Unity Health Torontounityhealth.to

A health network in Toronto providing primary, community, specialized, and long-term care services, as well as investing in research and education

Hospitals and Health Care 🇨🇦 Toronto 8,686 2017
6
The Hospital for Sick Childrensickkids.ca

Leading pediatric hospital integrating patient care, research, and education to advance children's health and develop innovative treatments globally.

Hospitals and Health Care 🇨🇦 Toronto 8,636 1875
7
The Ottawa Hospitalottawahospital.on.ca

Innovative teaching and research hospital providing specialized care, developing new treatments, and improving patient care through community engagement and global impact

Hospitals and Health Care 🇨🇦 Ottawa 7,679 1998
8
Sunnybrooksunnybrook.ca

A leading teaching hospital affiliated with the University of Toronto, specializing in patient care, groundbreaking research, and inventing the future of healthcare

Hospitals and Health Care 🇨🇦 Toronto 7,599 1948
9
London Health Sciences Centre (LHSC)lhsc.on.ca

Acute care teaching hospital offering specialized clinical services, leading in discovery and innovation, providing exceptional patient care and training healthcare professionals

Hospitals and Health Care 🇨🇦 London 7,092 n/a
10
Hamilton Health Scienceshamiltonhealthsciences.ca

Healthcare organization delivering specialized cardiac, stroke, trauma, cancer, palliative, and pediatric care to southwestern Ontario and beyond.

Hospitals and Health Care 🇨🇦 Hamilton 6,690 n/a
11
Trillium Health Partnersthp.ca

Leading hospital providing full range of acute care services, specialized programs, and community-based care Committed to delivering high-quality, accessible patient care

Hospitals and Health Care 🇨🇦 Mississauga 6,009 2011
12
Extendicareextendicare.com

A leading provider of senior care services in Canada, offering skilled nursing care, home health care, retirement living, and management services with a focus on quality, compassion, and excellence

Hospitals and Health Care 🇨🇦 Markham 5,980 1968
13
Bayshore HealthCarebayshore.ca

Providing personalized home and community healthcare services across Canada, supporting clients' independence and quality of life with customized care plans.

Hospitals and Health Care 🇨🇦 Mississauga 5,911 1966
14
Region of Peelpeelregion.ca

A diverse and inclusive organization in Peel Region delivering social services and infrastructure for residents and businesses, fostering a Community for Life

Government Administration 🇨🇦 Brampton 4,959 1974
15
St. Michael's Hospitalunityhealth.to

A leading hospital providing compassionate care, medical education in 27 disciplines, and research through the Keenan Research Centre for global impact

Hospitals and Health Care 🇨🇦 Toronto 4,868 1892
16
Chartwell Retirement Residenceschartwell.com

providing personalized, compassionate living environments for seniors, supporting residents, families, and employees through meaningful community connections

Hospitals and Health Care 🇨🇦 Mississauga 4,601 n/a
17
Rexall Pharmacy Group Ltd.rexall.ca

A trusted pharmacy brand in Canada, providing quality healthcare, products, and services to Canadian families and communities for over 100 years

Retail 🇨🇦 Mississauga 4,593 n/a
18
CAMHcamh.ca

A leading teaching hospital in Canada focused on transforming lives through clinical care, research, education, and advocacy for mental health and addiction issues

Hospitals and Health Care 🇨🇦 Toronto 4,477 1998
19
LifeLabs Medical Laboratory Serviceslifelabs.com

A leading Canadian provider of diagnostic information and digital health systems, offering laboratory tests, genetics services, and online patient portals

Hospitals and Health Care 🇨🇦 Toronto 4,356 n/a
20
William Osler Health Systemwilliamoslerhs.ca

Health system with three hospitals serving 13 million residents, providing a wide range of services including inpatient, outpatient, urgent care, and specialty clinics

Hospitals and Health Care 🇨🇦 Brampton 4,350 n/a
21
Costco Wholesale Canadacostco.ca

Global retailer with warehouse club operations in 8 countries, known for quality, value, and ethical business practices Family-oriented atmosphere for employee success

Wholesale 🇨🇦 Ottawa 4,127 1983
22
Sinai Healthsinaihealth.ca

A leading academic health science centre focused on integrated care, innovative research, and educating future healthcare leaders for comprehensive patient care

Hospitals and Health Care 🇨🇦 Toronto 4,083 n/a
23
York Region (The Regional Municipality of York)york.ca

The company provides services to 12 million residents, 54,000 businesses, and 650,000 employees in a two-tier government structure

Government Administration 🇨🇦 Newmarket 3,799 n/a
24
Lakeridge Healthlakeridgehealth.on.ca

A comprehensive healthcare provider with multiple hospitals, specialty centers, and community services, committed to delivering high-quality care to the region

Hospitals and Health Care 🇨🇦 Ajax 3,760 1998
25
Canadian Blood Servicesblood.ca

Canada's national organization responsible for ensuring a secure and sustainable supply of blood and organs for transfusion and transplantation

Non-profit Organizations 🇨🇦 Ottawa 3,745 1998
26
CBI Healthcbihealth.ca

Leading provider of rehabilitation and home health services in Canada, with a national team dedicated to improving clients' physical and mental health

Hospitals and Health Care 🇨🇦 Toronto 3,638 1974
27
Private Practice in Psychotherapy and Counselinglinkedin.com

Providing psychotherapy services to adults and couples to support their mental and emotional well-being

Mental Health Care 🇨🇦 Toronto 3,593 n/a
28
ParaMed Home Health Careparamed.com

Provider of home care and wellness solutions in Canada since 1974, offering fully trained care providers, ongoing training, support programs, and a strong workforce focused on core values

Hospitals and Health Care 🇨🇦 Markham 3,524 1974
29
Sienna Senior Livingsiennaliving.ca

Canada's leading senior living provider with a focus on cultivating happiness, offering a range of living options and personalized care services

Hospitals and Health Care 🇨🇦 Markham 3,417 1972
30
Humber River Healthhrh.ca

Leading digital hospital in North America using technology and clinical expertise to improve patient care, reduce errors, and drive community academic healthcare advancements

Hospitals and Health Care 🇨🇦 Toronto 3,272 n/a
31
Niagara Healthniagarahealth.on.ca

Regional hospital system providing acute care services, research, and innovation to improve healthcare for residents in the Niagara region

Hospitals and Health Care 🇨🇦 St. Catharines 3,213 n/a
32
Mackenzie Healthmackenziehealth.ca

Regional healthcare provider in Southwest York Region with two hospitals and community-based services, offering a wide range of healthcare programs and services to the community

Hospitals and Health Care 🇨🇦 Richmond Hill 3,197 1963
33
St. Joseph's Healthcare Hamiltonstjoes.ca

A values-based academic health science centre affiliated with McMaster University and Mohawk College, committed to providing integrated, compassionate care and advancing research and education

Hospitals and Health Care 🇨🇦 Hamilton 2,983 1890
34
Mount Sinai Hospital (Toronto), Sinai Healthmountsinai.on.ca

Internationally recognized academic health sciences center providing exemplary patient care, nursing excellence, and top employer culture Flagship clinical programs available

Hospitals and Health Care 🇨🇦 Toronto 2,951 1923
35
Lifemark Health Grouplifemark.ca

Canadian healthcare company offering rehab services, medical assessments, wellness programs, and career opportunities Committed to quality care, employee development, and community impact

Wellness and Fitness Services 🇨🇦 North York 2,924 1998
36
North York General Hospitalnygh.on.ca

A leading community academic hospital in Canada offering a wide range of acute, ambulatory, and long-term care services with a focus on patient- and family-centered care

Hospitals and Health Care 🇨🇦 North York 2,917 1968
37
SE Healthsehc.com

A not-for-profit social enterprise providing knowledge, care, and support to help clients achieve health and wellbeing goals Serving over 20,000 Canadians daily

Hospitals and Health Care 🇨🇦 Markham 2,851 1908
38
Kingston Health Sciences Centrekingstonhsc.ca

Top Canadian hospital, advancing health care through patient care, medical research, and training future healthcare professionals for Southeastern Ontario.

Hospitals and Health Care 🇨🇦 Kingston 2,793 1849
39
CHEOcheo.on.ca

A global leader in pediatric health care and research, providing excellence in complex care, education, and community partnership for children and youth

Hospitals and Health Care 🇨🇦 Ottawa 2,784 1974
40
Durham Region (The Regional Municipality of Durham)durham.ca

Durham Region provides a wide range of services to a group of diverse communities, including paramedics, recycling, water supply, transit, and social programs

Government Administration 🇨🇦 Whitby 2,624 1974
41
Southlake Healthsouthlake.ca

Delivering healthcare services to northern York Region and southern Simcoe County through advanced programs, exceptional staff, and a commitment to patient safety and quality care

Hospitals and Health Care 🇨🇦 Newmarket 2,601 n/a
42
Scarborough Health Networkshn.ca

A leading healthcare organization in Scarborough, offering diverse programs and services, including nephrology, cardiac care, spine center, and medical training partnerships with universities

Hospitals and Health Care 🇨🇦 Scarborough 2,536 2018
43
Halton Healthcarelinktr.ee

A healthcare organization with three community hospitals providing services to nearly 400,000 residents in Halton Hills, Milton, and Oakville, focused on exemplary patient experiences

Hospitals and Health Care 🇨🇦 Oakville 2,461 1998
44
Michael Garron Hospitaltehn.ca

A vibrant community hospital in East Toronto providing high-quality, patient-centred healthcare services along the continuum of care with strong partnerships

Hospitals and Health Care 🇨🇦 Toronto 2,219 1929
45
Royal Victoria Regional Health Centrervh.on.ca

Healthcare institution in Barrie, Ontario serving over 450,000 residents with specialized services like interventional radiology, stroke care, trauma, cancer, heart, child, and youth programs

Hospitals and Health Care 🇨🇦 Barrie 2,191 1897
46
Region of Waterlooregionofwaterloo.ca

Provides municipal services including transit, waste management, health, housing, and employs over 3,500 people in diverse roles.

Government Administration 🇨🇦 Kitchener 2,165 1973
47
Grand River Hospitalwrhn.ca

Ontario's large community hospital in Kitchener - Waterloo, offering a wide range of medical programs and services with over 6000 team members

Hospitals and Health Care 🇨🇦 Kitchener 2,058 n/a
48
Oak Valley Healthoakvalleyhealth.ca

A leading Ontario community health care organization with two hospitals and a Reactivation Care Centre, providing high-quality, patient-centered care Funded by community donations

Hospitals and Health Care 🇨🇦 Markham 1,969 1990
49
Dynacaredynacare.ca

Leading provider of health and wellness solutions in Canada through accurate diagnostic information, innovative technology, and specialized health services for individuals, insurance industry, workplaces, and diagnostics

Hospitals and Health Care 🇨🇦 Brampton 1,954 n/a
50
VON Canadavon.ca

A nonprofit organization providing innovative clinical, personal, and social support services for people to live comfortably in their own homes

Home Health Care Services 🇨🇦 Ottawa 1,879 1897
51
Health Sciences North/Horizon Santé-Nordhsnsudbury.ca

An integrated network providing high-quality patient care, research, teaching, and services in various medical specialties to communities in Northern Ontario

Hospitals and Health Care 🇨🇦 Sudbury 1,755 n/a
52
Amica Senior Lifestylesamica.ca

Premium senior living provider in Canada offering personalized care, independent living, assisted living, and memory care options with luxury amenities and expert support

Hospitality 🇨🇦 Toronto 1,752 1996
53
Innomar Strategiesinnomar-strategies.com

provides comprehensive patient support services for specialty pharmaceuticals including consulting, nursing, pharmacy, logistics, and patient assistance programs

Pharmaceutical Manufacturing 🇨🇦 Oakville 1,724 n/a
54
St. Joseph's Health Care Londonsjhc.london.on.ca

A leading academic health care organization in Canada providing compassionate care, teaching, and research to help people live life fully

Hospitals and Health Care 🇨🇦 London 1,707 1869
55
Schlegel Villagesschlegelvillages.com

Schlegel Villages manages long term care and retirement communities in Ontario, focusing on building strong communities and providing quality of life for older adults

Hospitals and Health Care 🇨🇦 Kitchener 1,673 1953
56
GreenShieldgreenshield.ca

National nonprofit health and benefits company combining insurance and health services to improve outcomes and support underserved Canadian communities.

Non-profit Organizations 🇨🇦 Windsor 1,666 1957
57
Thunder Bay Regional Health Sciences Centretbrhsc.net

An academic health sciences centre providing comprehensive care, medical research, and training for healthcare providers in a region the size of France

Hospitals and Health Care 🇨🇦 Thunder Bay 1,655 n/a
58
VHA Home HealthCarevha.ca

A not-for-profit organization providing high quality care with over 3,000 diverse professionals to vulnerable populations in various community settings

Hospitals and Health Care 🇨🇦 Toronto 1,567 1925
59
Dentalcorpdentalcorp.ca

Supporting dental practices across North America by providing seamless, efficient solutions to enhance patient care and operational excellence.

Hospitals and Health Care 🇨🇦 Toronto 1,543 2011
60
City of Greater Sudburygreatersudbury.ca

Dynamic team in Northeastern Ontario's regional capital focused on enhancing citizens' quality of life through services in technology, tourism, education, government, and health

Government Administration 🇨🇦 Sudbury 1,443 n/a
61
Peterborough Regional Health Centreprhc.on.ca

A regional hospital providing acute healthcare to over 300,000 people with specialized programs in renal, stroke, cardiac, cancer care, and mental health services

Hospitals and Health Care 🇨🇦 Peterborough 1,440 1885
62
Scarborough and Rouge Hospitalsrhhospital.ca

Healthcare organization with multiple hospital sites and regional programs offering a wide range of medical services, recognized for excellence in various specialties

Hospitals and Health Care 🇨🇦 Scarborough 1,408 2016
63
Baycrestbaycrest.org

Global leader in aging and brain health innovations, offering comprehensive care for aging patients, conducting top research in cognitive neuroscience, and promoting global knowledge exchange

Hospitals and Health Care 🇨🇦 Toronto 1,407 1918
64
CarePartnerscarepartners.ca

Providing compassionate home and community health care services with innovative programs addressing evolving needs of patients and caregivers.

Hospitals and Health Care 🇨🇦 Waterloo 1,367 1984
65
Queensway Carleton Hospitalqch.on.ca

A patient and family-centered hospital in Ottawa providing acute care services with a focus on emergency, childbirth, geriatrics, mental health, and rehabilitation

Hospitals and Health Care 🇨🇦 Ottawa 1,335 1976
66
Calian Groupcalian.com

Providing diverse technology and healthcare solutions across communications, learning, security, and advanced technologies with a customer-focused approach.

Strategic Management Services 🇨🇦 Ottawa 1,303 1982
67
Bruyère Healthbruyere.org

The company provides a range of health care services including rehabilitation, complex care, family health teams, long-term care, and senior living options Their mission is to enhance quality of life through integrated care

Hospitals and Health Care 🇨🇦 Ottawa 1,298 1845
68
Public Health Ontariopublichealthontario.ca

A Crown corporation in Ontario dedicated to protecting public health, providing scientific evidence, expert guidance, and promoting health equity

Hospitals and Health Care 🇨🇦 Toronto 1,260 2007
69
Quinte Healthquintehealth.ca

Provider of high quality health care services through four hospitals in Prince Edward, Hastings, and Northumberland Counties, offering a wide range of medical care and services

Hospitals and Health Care 🇨🇦 Belleville 1,228 1998
70
St. Mary's General Hospitalwrhn.ca

A leading healthcare provider in Kitchener offering compassionate care, innovative healthcare services, and a commitment to excellence for patients and staff

Hospitals and Health Care 🇨🇦 Kitchener 1,228 1924
71
Markham Stouffville Hospitaloakvalleyhealth.ca

Healthcare organization transitioning to a new LinkedIn page Former page for a specific hospital will be removed Exciting updates ahead

Hospitals and Health Care 🇨🇦 Markham 1,215 n/a
72
Princess Margaret Cancer Centreuhnresearch.ca

Leading cancer research center with internationally recognized scientists focusing on various aspects of cancer through cutting-edge research and state-of-the-art tools

Medical Practices 🇨🇦 Toronto 1,211 n/a
73
Women's College Hospitalwomenscollegehospital.ca

A pioneering healthcare institution focusing on women's health, innovation, and addressing Canada's healthcare challenges through interdisciplinary teams and equitable work environment

Hospitals and Health Care 🇨🇦 Toronto 1,200 n/a
74
Joseph Brant Hospital & Foundationjosephbranthospital.ca

A full-service community teaching hospital in Burlington, Ontario, offering compassionate care, exemplary service, and educational opportunities through partnerships with universities

Hospitals and Health Care 🇨🇦 Burlington 1,155 1961
75
North Bay Regional Health Centre (NBRHC)nbrhc.on.ca

Healthcare organization providing acute care, specialist services, and mental health care with 389 beds, outpatient services, and outreach programs in northeast Ontario

Hospitals and Health Care 🇨🇦 North Bay 1,108 2011
76
Sault Area Hospitalsah.on.ca

State-of-the-art hospital serving a catchment population of 115,000 residents, offering a range of medical services and programs including cancer and renal care

Hospitals and Health Care 🇨🇦 Sault Ste. Marie 1,098 1898
77
CareRx Corporationcarerx.ca

Leading provider of specialty pharmacy services to seniors in Canada, serving various healthcare facilities with timely delivery and effective medication management solutions

Hospitals and Health Care 🇨🇦 Toronto 1,089 n/a
78
University of Ottawa Heart Instituteottawaheart.ca

A leading cardiovascular health center in Canada providing high-tech, personalized care, advancing cardiac medicine through research, and pioneering new treatments globally

Hospitals and Health Care 🇨🇦 Ottawa 1,087 n/a
79
Holland Bloorview Kids Rehabilitation Hospitalhollandbloorview.ca

Pioneering treatments, technologies, and programs for children with disabilities to fully participate in life through a world-class teaching hospital

Hospitals and Health Care 🇨🇦 Toronto 1,086 n/a
80
St. Joseph's Health Centre, Torontounityhealth.to

A Catholic teaching hospital in West Toronto, affiliated with the University of Toronto, dedicated to advancing community health through partnerships and resident input

Hospitals and Health Care 🇨🇦 Toronto 1,070 1921
81
Hôpital Montforthopitalmontfort.com

An academic hospital in Ontario, focused on exceptional patient care and staff well-being, emphasizing collaboration, innovation, and skill development

Hospitals and Health Care 🇨🇦 Ottawa 1,054 1953
82
Credit Valley Hospitalthp.ca

Leading hospital with outstanding performance, fiscal responsibility, and quality patient care across three main sites offering acute care and specialized programs

Hospitals and Health Care 🇨🇦 Mississauga 1,036 1985
83
Ontario Shores Centre for Mental Health Sciencesontarioshores.ca

A mental health care provider offering specialized assessments and treatment services in a recovery-oriented environment, alongside research, education, and advocacy initiatives

Hospitals and Health Care 🇨🇦 Whitby 1,006 1919
84
The Royaltheroyal.ca

specialized mental health care, advocacy, research, education, and fundraising to support recovery for complex and treatment-resistant mental illness

Hospitals and Health Care 🇨🇦 Ottawa 962 1910
85
Guelph General Hospitalgghorg.ca

A comprehensive acute care facility offering advanced technology, diagnostic support, specialty programs, and services to residents of Guelph and Wellington County

Hospitals and Health Care 🇨🇦 Guelph 946 1875
86
Spectrum Health Care (SHC)spectrumhealthcare.com

Leading provider of home health care services in Ontario, offering nursing, personal support, foot care, and wellness clinics with patient-focused motto "Always With You"

Hospitals and Health Care 🇨🇦 Toronto 937 n/a
87
Southbridge Care Homessouthbridgecarehomes.com

This company manages long-term care homes, retirement communities, and independent living facilities in Ontario, focusing on creating caring environments for seniors

Hospitals and Health Care 🇨🇦 Cambridge 914 1967
88
Princess Margaret Cancer Centreuhn.ca

Keep up-to-date on the latest developments and changes at a prominent hospital through news articles and general information

Medical Practices 🇨🇦 Toronto 898 n/a
89
Providence Careprovidencecare.ca

Leading provider of specialized care in aging, mental health, and rehabilitation, offering hospital, long-term care, hospice, and community-based services with a focus on independence and quality of life

Hospitals and Health Care 🇨🇦 Kingston 898 1861
90
WoodGreen Community Serviceswoodgreen.org

A social service agency in Toronto providing housing, health services, support for diverse populations, financial counseling, employment services, childcare, and settlement services

Community Services 🇨🇦 Toronto 877 1937
91
We Care Home Health Serviceswecare.ca

We provide professional and compassionate homecare services, allowing seniors and individuals in need to live comfortably in familiar surroundings across Canada

Hospitals and Health Care 🇨🇦 Toronto 866 1984
92
Brant Community Healthcare Systembchsys.org

A leading community health care organization with a regional acute care health center and urgent/ambulatory care facility, staffed by over 2,300 professionals

Hospitals and Health Care 🇨🇦 Brantford 841 1885
93
Massage Addictmassageaddict.ca

A Canadian wellness provider offering massage therapy, chiropractic care, acupuncture, and reflexology in modern clinics with preferred membership pricing

Wellness and Fitness Services 🇨🇦 Toronto 795 2008
94
Municipality of Chatham-Kentchatham-kent.ca

A municipality in Ontario with a population of 100,000+, Chatham-Kent focuses on providing services, preserving heritage, and promoting economic growth in a diverse region

Government Administration 🇨🇦 Chatham 773 1998
95
The Scarborough Hospitaltsh.to

A diverse, award-winning hospital in Canada offering high-quality, patient-focused care with a range of services and regional programs Partnered with University of Toronto

Hospitals and Health Care 🇨🇦 Scarborough 766 1956
96
Orillia Soldiers'​ Memorial Hospitalosmh.on.ca

A healthcare provider in Ontario's lake country offering medical, surgical, critical care, mental health, and orthopaedic services to local and regional communities

Hospitals and Health Care 🇨🇦 Orillia 753 1908
97
CBI Home Healthcbihomehealth.ca

Providing a wide range of healthcare services in various settings, including in-home care, to help patients of all ages achieve maximum function and independence

Hospitals and Health Care 🇨🇦 Toronto 744 1974
98
Seasons Retirement Communitiesseasonsretirement.com

A Canadian company operating senior retirement communities in Ontario and Alberta, committed to providing residents with superior customer service and supporting team members' growth

Hospitals and Health Care 🇨🇦 Oakville 732 2009
99
Waypoint Centre for Mental Health Carewaypointcentre.ca

Specialty mental health hospital in Penetanguishene, offering inpatient and outpatient services, academic partnerships, and the province's only maximum secure forensic mental health programs

Mental Health Care 🇨🇦 Penetanguishene 730 1904
100
Orngeornge.ca

This company provides air ambulance service and medical transport for critically ill or injured individuals, ensuring they reach their destination safely

Hospitals and Health Care 🇨🇦 Mississauga 717 2005

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.

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