These links are not exhaustive and it would be helpful to know of any other societies for art libraries/librarians.
Art documentation societies around the world
Asia Pacific
https://www.arlisanz.org/
ARLIS in Australia and New Zealand (ARLIS/ANZ).
Europe
www.akmb.de
Arbeitsgemeinschaft der Kunst- und Museumbibliotheken (AKMB) is the organization for art librarians in Germany. The chairpersons are Margret Schild, Theatermuseum Duesseldorf and Birgit Fernengel, Die Neue Sammlung – Staatliches Museum fuer angewandte Kunst.
www.arlisnorden.org
The organization for ARLIS in Denmark, Finland, Iceland, Norway and Sweden. Each country has a representative who serves on the Executive Board, which governs the organization.
www.okbn.nl
Overleg Kunst(historische) Bibliotheken Nederland (OKBN) is also known as ARLIS/NL. The chairperson is Heleen Homma, Rijksdienst voor Archeologie, Cultuurlandschap en Monumenten / Directiesecretaris RACM.
www.okbv.be
Overleg Kunstbibliotheken Vlaanderen (OKBV) is the association for art librarians from Flanders and Brussels and is a a subsection of the Libraries Association of Flanders (VVBAD). Dries Moreel is the chairperson.
www.artun.ee
The Society of Estonian Art Libraries does not have a website. However, their president is Elvira Mutt, Library of the Estonian Art Academy,
The Americas
www.arlisna.org
The home site for ARLIS in North America (ARLIS/NA). For a list of the current board members, please see:
https://www.arlisna.org/organization/executive-board
www.arliscanada.ca
The Canadian chapter of ARLIS/NA.
https://redartesp.wordpress.com/
Redarte is an information network of art libraries in Sao Paulo and Rio de Janeiro. Their web presence is through the Goethe-Institut Brazil website.
http://www.redvitruvio.org/
Red Vitruvio is the network for libraries of architecture, art, design and urbanism in Argentina, Ecuador, Peru and Uruguay. It has a six member coordinating committee.
Other international associations of art library professionals
http://www.ifla.org/en/art-libraries
IFLA Art Libraries Section meets annually at the IFLA World Information Congress. The current chairperson of the section is Olga Sinitsyna, All-Russia State Library for Foreign Literature.
http://scottish-visual-arts-group.blogspot.com/
The Scottish Visual Arts Group (SVAG) represents librarians and information providers from academic and public libraries, museums, galleries and other institutions concerned with the promotion and documentation of the visual arts in Scotland.
www.vraweb.org
Visual Resources Association (VRA) is the organization concerned with image management in the commercial, educational and cultural heritage sectors. The president is Allan T. Kohl, Minneapolis College of Art & Design.