In 2008, Ontario's regulated professions had 707,718 members. The following chart shows a breakdown of members by profession and where they received their training.
| Professions | Number of Members | |
|---|---|---|
| Teachers | 219,181 | |
| Nurses | 149,284 | |
| Engineers | 71,495 | |
| Lawyers | 40,000 | |
| Physicians and Surgeons | 33,900 | |
| Chartered Accountants | 33,145 | |
| General Accountants | 18,865 | |
| Management Accountants | 17,444 | |
| Engineering Technicians and Technologists | 14,929 | |
| Social Workers | 11,417 | |
| Pharmacists | 11,408 | |
| Dental Hygienists | 10,367 | |
| Massage Therapists | 8,299 | |
| Dental Surgeons | 8,168 | |
| Medical Laboratory Technologists | 7,750 | |
| Physiotherapists | 6,880 | |
| Medical Radiation Technologists | 6,324 | |
| Occupational Therapists | 4,437 | |
| Veterinarians | 3,928 | |
| Chiropractors | 3,540 | |
| Audiologists and Speech Language Pathologists | 3,176 | |
| Psychologists | 3,053 | |
| Dietitians | 2,905 | |
| Respiratory Therapists | 2,640 | |
| Architects | 2,611 | |
| Paralegals | 2,300 | |
| Opticians | 2,256 | |
| Optometrists | 1,605 | |
| Geoscientists | 1,457 | |
| Social Service Workers | 1,180 | |
| Foresters | 693 | |
| Land Surveyors | 645 | |
| Denturists | 540 | |
| Chiropodists | 501 | |
| Dental Technologists | 483 | |
| Midwives | 382 | |