British Combinatorial Committee
- Conference listings, bulletin and links maintained by Peter Cameron.
- http://www.maths.qmw.ac.uk/~pjc/bcc/

CADCOM
- Committee for the Advancement of Discrete and Combinatorial Mathematics.
- http://www.dms.auburn.edu/~rodgec1/cadcom/

Combinatorial Mathematics Society of Australasia
- Combinatorics throughout Australia, New Zealand and neighbouring countries.
- http://www.maths.uq.edu.au/~db/CMSA/cmsa.html

(Austria) Academy of Sciences
- Institute of Discrete Mathematics.
- http://www.ricam.oeaw.ac.at/dismat/

(Australia) The University of Queensland
- Centre for Discrete Mathematics and Computing.
- http://www.maths.uq.edu.au/cdmc/

(Italy) Catania University
- Catania Combinatorial Group. History, people, activities, visitors.
- http://www.dmi.unict.it/~gquattro/ctcombinatoria/

(France) Laboratoire d'informatique de l'IGM
- Research into the relations between algebra and combinatorics.
- http://phalanstere.univ-mlv.fr/

(USA) Texas A+M
- Combinatorics/Number Theory Directory. Members, interests. Graph theory, combinatorial number theory.
- http://www.math.tamu.edu/research/research_areas/cnt.html

(UK) Queen Mary College, London
- Design Research Group. Courses, lecture notes, members, design resources.
- http://www.maths.qmul.ac.uk/~pjc/design/drg.html

(Europe) Combinatorics, Geometry and Computation
- A European graduate programme.
- http://www.cgc.ethz.ch/

(South Korea) Pohang University of Science and Technology
- Combinatorial and Computational Mathematics Centre (Com2MaC).
- http://com2mac.postech.ac.kr/

(Sweden) Gothenburg
- Combinatorics group at Chalmers University of Technology and Gothenburg University.
- http://www.math.chalmers.se/Math/Research/Combinatorics/

(France) INRIA
- Algorithms Project. Interests in design and analysis of algorithms, computer algebra, combinatorial analysis and asymptotics.
- http://algo.inria.fr/

(Netherlands) Euler Institute for Discrete Mathematics and its Applications (EIDMA)
- Discrete Algebra and Geometry, Coding Theory, Information Theory and Cryptology, Combinatorial Optimization and Algorithms, Graph Theory.
- http://www.win.tue.nl/math/eidma/

(New Zealand) University of Auckland
- Centre for Discrete Mathematics and Theoretical Computer Science.
- http://www.cs.auckland.ac.nz/CDMTCS/

(Japan) Tsukuba
- Japanese Center for Combinatorics and its Applications. A virtual research centre. Links, lists.
- http://infoshako.sk.tsukuba.ac.jp/jcca/

(UK) London School of Economics
- Centre for Discrete and Applicable Mathematics. Members, activities, publications.
- http://www.cdam.lse.ac.uk/