Australia 

The Statistical Mechanics and Combinatorics Group 
The University of Melbourne 
Centre for Discrete Mathematics and Computing 
The University of Queensland 
The Categories and Combinatorics Group 
The University of Sydney 
Austria 

Combinatorics at RISC 
Johannes Kepler Universität Linz 
The Combinatorics Group at the Universität Wien


Belgium 

COSIC: COmputer Security and Industrial Cryptography


Research group on Incidence Geometry

Ghent University 
Brazil 

The Combinatorics Research Group

Universidade de Sao Paulo 
Britain 

Oxford Combinatorics 
Oxford University 
Canada 

The Centre for Experimental and Constructive Mathematics (CECM)

Simon Fraser University 
Discrete Mathematics

Queen's University 
The McGill Discrete Mathematics Group

McGill University 
Laboratoire de combinatoire et d'informatique mathématique (LaCIM)

Université du Québec à Montréal 
Applied and Discrete Mathematics

University of Toronto 
Department of Combinatorics and Optimization

University of Waterloo 
China 

Center for Combinatorics

Nankai University 
Denmark 

Discrete Mathematics and Graph Theory

Odense University 
France 

Laboratoire Bordelais de Recherche en Informatique (LaBRI)

Domaine Universitaire 
Institut Gaspard Monge

Université de MarnelaVallee 
Laboratoire de Probablites, Combinatoire et Statistique  Lapcs

Université Calude Bernard Lyon 1 
Department of Discrete Mathematics

the Leibniz Laboratory 
The Algorithms Project at INRIA (France)


Analysis of Algorithms Group at INRIA


Germany 

Algorithmische und Diskrete Mathematik

Technische Universität Berlin 
Algebraic Combinatorics, Discrete Mathematics, Computer Science

University of Bayreuth 
Combinatorial Optimization & Graph Algorithms Group

Technische Universität Berlin 
Discrete Mathematics Group

Technische Universiteit Eindhoven 
Research Group on Discrete Mathematics, Interconnection Networks, and Communication

Universität Hamburg 
Hungary 

The Hungarian Group


Italy 

Combinatorics and Algorithm analysis Research Group

Università degli Studi di Firenze 
Discrete Mathematics and Theoretical Computer Science

Università degli Studi di Firenze 
Japan 

Japanese Center for Combinatorics and its Applications


Korea 

Korea Combinatorics Forum


Netherlands 

Dmanet: Discrete Mathematics and Algorithms

maintained by the Operations Research and Mathematical Programming group at the University of Twente 
The Euler Institute for Discrete Mathematics and its Applications (EIDMA)


The Discrete Mathematics Group

Eindhoven University of Technology 
New Zealand 

Centre for Discrete Mathematics and Theoretical Computer Science 
The University of Auckland 
Portugal 

Linear Algebra and Combinatorics Group

University of Lisbon 
Russia 

Laboratory of Data Analysis, Error Correction Codes and Cryptology

Russian Academy of Sciences 
Laboratory of Graph Theory and Combinatorics in Moscow


Singapore 

The Combinatorics and Operational Research Division

The National University of Singapore 
South Africa 

The John Knopfmacher Centre for Applicable Analysis and Number Theory


Spain 

The research group on Graph Theory and Combinatorics

Universitat Politècnica de Catalunya 
Sweden 

Combinatorics at Chalmers/GU


Combinatorics at KTH


The Combinatorics and Graph Theory Group

Umea University 
Switzerland 

Discrete structures

Zurich 
United Kingdom 

British Combinatorial Committee (BCC)


Centre for Discrete and Applicable Mathematics

London School of Economics 
The Combinatorics Research Group

Open University 
People in Combinatorics at Oxford

Oxford University 
QMW Combinatorics Study Group

Queen Mary and Westfield College 
Number Theory & Combinatorics

University of Glasgow 
Strathclyde Combinatorics Group

University of Strathclyde 
USA 

Algorithms, Combinatorics and Optimization

Georgia Tech 
Department of Mathematics and Statistics

Auburn University 
MIT Combinatorics Faculty


RUTCOR


The Combinatorics Group

Emory University 
Combinatorics and Algorithms Research Group

University of California, San Diego 
Combinatorics at the University of Illinois


East Coast Combinatorics


The Discrete Mathematics Faculty

University of Colorado at Denver 
Algebra and Combinatorics

Clemson Univesity 
Discrete Mathematics Group

University of Delaware 
The Combinatorics Group

Louisiana State University 
Combinatorics Group at University of Michigan


The MTU Combinatorics

Michigan Technological University 
Discrete Mathematics Group

Arizona State University 
Center for Applied Cryptographic Research (CACR)

University of Waterloo 
Algorithms, Combinatorics and Optimization

Carnegie Mellon University 
DIMACS


The Combinatorics Group at University of Minnesota


Discrete Mathematics

University of Kentucky 
Combinatorics at University of Kansas


Algebra and Combinatorics Research Group at Texas A&M University


SIAM Activity Group on Discrete Mathematics


SIAM Activity Group on Orthogonal Polynomials and Special Functions

