Here's a few groups that work to raise thyroid awareness, offer support, and try to create change in thyroid disease diagnosis and treatment: (some are in the US - others are in other countries - some are international Please see individual groups for that info)

http://www.thyroid.org/patient-thyroid-information/what-is-thyroid-disease/

http://www.thyroiduk.org.uk/tuk/index.html

This link lists "how to find a doctor" but if you scroll down you see some great group resources:
http://hypothyroidmom.com/top-10-resources-to-find-a-great-thyroid-doctor-in-2013/

https://www.facebook.com/BetterThyroidCare

http://www.thyrophoenix.com/thyroid_support_groups.htm

http://www.allthyroid.org/alliance/

If you know of another resource - please list it.