International Association of Mathematical Physics http://www.iamp.org/
The International Association of Mathematical Physics (IAMP) was founded in order to promote research in mathematical physics. The Association invites mathematicians and physicists (including students) interested in this goal to become members.
(UK) Edinburgh http://www.maths.ed.ac.uk/EMPG/
Edinburgh Mathematical Physics Group, a group of mathematicians and physicists from across the Edinburgh Universities. People, research, seminars, jobs and resources.