- American Thyroid Association - The ATA provides leadership in thyroidology by promoting excellence and innovation in clinical care, research, education, and public policy.
- Thyroid Foundation of Canada - Provides up-to-date information for thyroid patients and their families. It also provides links to other health and thyroid related organizations and Internet resources. National office in Kingston, Ontario.
- Thyroid-Info - Thyroid information, including forums and recommendations.