Croatian Physical Society - The Croatian Physical Society is a public organisation with the purpose of promoting and developing scientific, upbringing, educational and cultural activity in the field of physics and related fields of science
International Association of Mathematical Physics - The International Association of Mathematical Physics (IAMP) was founded in 1976 in order to promote research in mathematical physics. The Association invites mathematicians and physicists (including students) interested in this goal to become members.
Polish Physical Society - Information on the statutes and members, as well as award winners of the society. Also contains links to other relevant sites.
Sigma Pi Sigma: The National Physics Honor Society - Exists to honor outstanding scholarship in physics; to encourage interest in physics among students at all levels; to promote an attitude of service of its members towards their fellow students, colleagues, and the public; and to provide a fellowship of persons who have excelled in physics.