British Thyroid Association
   Professional clinical specialist doctors and scientists in the United Kingdom who manage patients and/or are researching thyroid diseases.
   http://www.british-thyroid-association.org/

British Thyroid Foundation
   A patient-led charitable organisation dedicated to helping those with thyroid disorders.
   http://www.btf-thyroid.org

Broda O. Barnes M.D. Research Foundation Inc.
   Not-for-profit organization dedicated to education, research, and training in the field of thyroid and metabolic balance.
   http://www.brodabarnes.org/

European Euthyroid Project
   Aims to fully understand the metabolism and interconversion of iodothyronines during human development.
   http://www.euthyroid.org

European Thyroid Association
   Aims are to promote knowledge in the thyroid field (fundamental and clinical) and improve knowledge of the thyroid gland and its diseases. Find a notice board, events, and a newsletter.
   http://www.eurothyroid.com

LATS - Latin American Thyroid Society
   Members only site for medical professionals.
   http://www.lats.org/

The American Thyroid Association
   Information, research, and resources for health professionals and patients.
   http://www.thyroid.org/

The Australian Thyroid Foundation Limited
   Offers support by telephone and through meetings via membership.
   http://www.thyroidfoundation.com.au/

The Thyroid Foundation of America
   Education, support services, and referrals to thyroid specialists.
   http://www.tsh.org/

Thyroid Australia
   Provides personal support, counselling, information and training. Aims to raise awareness and interest in thyroid conditions.
   http://www.thyroid.org.au

Thyroid Federation International
   This is a worldwide umbrella organization. Members include most thyroid support and education groups. For Thyroid Patients section lists symptoms of hyperthyroid and hypothyroid disorders.
   http://www.thyroid-fed.org/

Thyroid Foundation of Canada
   Thyroid educational materials including online videos, public meetings, and articles. Version Francais available.
   http://www.thyroid.ca/index.html

Thyroid Patient Advocacy
   UK group campaigning for better treatment of the hypothyroid patient.
   http://www.tpa-uk.org.uk

Thyroid UK
   Non-profit organisation campaigning for and providing information including support to those with thyroid or related disease.
   http://www.thyroiduk.org/

TriFoundation
   Non profit, volunteer organization that provides information to raise the level of awareness and education about thyroid disorders.
   http://www.trifoundation.com/