- Dec 10-12, Ryerson University and York University, Toronto, Ontario, Canada, session on Complex Networks, CMS Winter Meeting 2011
- Dec 5-9, Monash University, Melbourne, Australia, 35th Australasian Conference on Combinatorial Mathematics & Combinatorial Computing
- Nov 24-26, Krynica, Poland, 20th Workshop "3in1" 2011
- Nov 21-25, Bordeaux, France, Bordeaux Workshop on Identifying Codes and related topics (BWIC 2011)
- Nov 19, Seattle University, Seattle, WA,
*n*th Annual Combinatorial Potlatch - Nov 11-12, Otto-von-Guericke-Universitát, Magdeburg, Germany, Colloquium on Combinatorics
- Nov 7-11, Universidad de Buenos Aires, Buenos Aires, Argentina, Workshop on Algebraic Topology and Combinatorics
- Nov 7-8, Carmona, Spain, VII Andalucian Meeting on Discrete Mathematics
- Nov 5-6, Georgia State University, Atlanta, GA, Atlanta Lecture Series in Combinatorics and Graph Theory IV
- Oct 26-29, University of West Georgia, Carrollton, GA, Integers Conference 2011
- Oct 20-21, University of Nevada - Las Vegas, Las Vegas, NV, 25th Midwest Conference on Combinatorics, Cryptography, and Computing
- Oct 14-16, University of Nebraska, Lincoln, NE 2011 Fall AMS Central Section Meeting #1074, special sessions on Coding Theory, Extremal and Probabilistic Combinatorics, and Matrices and Graphs
- Sep 24-25, Wake Forest University, Winston-Salem, NC 2011 Fall AMS Southeastern Section Meeting #1073, special sessions on Combinatorial Algebraic Geomety, Extremal Combinatorics, and New Developments in Graph Theory
- Sep 21-23, Eindhoven, the Netherlands, 19th International Symposium on Graph Drawing (GD2011)
- Sep 19-25, Halkidiki, Greece, Symposium Graphs Item 15 of ICNAAM 2011
- Sep 18-23, Szklarska Poreba, Poland, (CID 2011) Colourings, Independence and Domination (14th Workshop)
- Sep 12-16, Czech Technical University and Charles University, Prague, Czech Republic, WORDS 2011 - 8th biannual conference for Combinatorics on Words
- Sep 4-9, Novy Somkovec, Slovakia, Workshop Cycles & Colorings (C&C 2011)
- Sep 3-4, Budapest, Hungary, Gyula O.H. Katona will be 70
- Aug 29-Sep 2, Budapest, Hungary, EUROCOMB'11 - European Conference on Combinatorics, Graph Theory and Applications 2011
- Aug 23-26, Rijksuniversiteit Groningen, The Netherlands, FRICO 2011 (15th Workshop on Future Research in Combinatorial Optimization)
- Aug 22-26, Budapest, Hungary, Paul Turán Memorial Conference
- Aug 17-19, Princeton University, Princeton, NJ, 14th International Workshop on Approximation Algorithms for Combinatorial Optimization Problems (APPROX'2011) and the 15th International Workshop on Randomization and Computation (RANDOM'2011)
- Aug 15-17, Polytechnic Institute of New York University, Brooklyn, NY, Algorithms and Data Structures Symposium (WADS 2011)
- Aug 12-16, Fields Institute, Toronto, Canada, Workshop on Approximability of Constraint Satisfaction Problems (see mailing list)
- Aug 10-12, Fields Institute and University of Toronto, Toronto, Canada, 23rd Canadian Conference on Computational Geometry (CCCG 2011)
- Aug 7-20, Budapest, Hungary Memphis-Budapest Summer School in Combinatorics
- Aug 2-6, Fields Institute, Toronto, Canada, Workshop on Algebra and Constraint Satisfaction Problems (see mailing list)
- Aug 1-21, Glushkov Institute of Cybernetics, Kyiv, Ukraine, Workshop on Discrete and Nondifferentiable Optimization: Algorithms and Applications (International Research Experience for Students - IRES)
- Jul 25-29, Waterloo, Ontario, Laurier Centennial Conference (ostensibly subtitled "Applied Mathematics, Modeling and Computational Science", this meeting also has special sessions on Structural Graph Theory and other combinatorial topics
- Jul 22-23, University of Regina, Regina, Canada 2011 Prairie Discrete Math Workshop
- Jul 18-21, University of Regina, Regina, Canada Graphs, Designs and Algebraic Combinatorics
- Jul 15-16, Saint Michael's College, Colchester, Vermont, Discrete Mathematics Days at Saint Michael's College
- Jul 11-15, Universidade Nova de Lisboa, Lisboa, Portugal Combinatorics Conference in Lisboa (CCL 2011)
- Jul 11-15, Fields Institute, Toronto, Canada, Workshop on Graph Homomorphisms (see mailing list)
- Jul 9-10, University of Coimbra, Portugal, Directions in Matrix Theory 2011
- Jul 3-8, University of Exeter, Exeter, UK 23rd British Combinatorial Conference
- Jul 3, Institute of Theoretical Computer Science, ETH Zurich, Switzerland, GA - Graph algorithms and Applications (in honor of Giorgio Ausiello's 70th birthday, co-located with ICALP 2011)
- Jun 27-30, Universidad de Alcalá, Alcalá de Henares, Spain, XIV Spanish Meeting on Computational Geometry (on the occasion of Ferran Hurtado's 60th birthday)
- Jun 27-29, Palermo, Italy, CPM 2011 - 22nd Annual Symposium on Combinatorial Pattern Matching
- Jun 26-Jul 2, Koc University, Istanbul, Turkey, 2nd Istanbul Design Theory, Graph Theory and Combinatorics Conference
- Jun 26-Jul 2, Rogla, Slovenia, Algebraic Graph Theory Summer School 2011
- Jun 26-30, Fields Institute, Toronto, Canada, Fields Institute Summer School on Constraint Satisfaction Problems (see mailing list)
- Jun 24-26, near Berlin, Germany, Summer School on Discrete Optimization and Network Flows
- Jun 24, Paris, France, Workshop on Games, Algorithms, and Optimization
- Jun 21-24, Teplá Monastery, Czech Republic, (WG 2011) 37th International Workshop on Graph-Theoretic Concepts in Computer Science
- Jun 20-24, California Polytechnic State Univ, San Luis Obispo, CA, Permutation Patterns 2011
- Jun 20-23, University of Waterloo, Waterloo, Ontario, Canada, Mixed Integer Programming Workshop (MIP 2011)
- Jun 20-22, Victoria, BC, Canada, IWOCA 2011, 22nd International Workshop On Combinatorial Algorithms
- Jun 19-25, Lake Bled, Slovenia, 7th Slovenian International Conference on Graph Theory
- Jun 15-17, IBM Watson Research Center, Yorktown Heights, NY, IPCO XV, Conference on Integer Programming and Combinatorial Optimization
- Jun 14-16, Università di Roma "Tor Vergata", Villa Mondragone, Frascati (Rome), Italy 10th Cologne-Twente Workshop on Graphs & Combinatorial Optimization (CTW 2011)
- Jun 13-17, Budapest, Hungary, Infinite and Finite Sets (Andras Hajnal is 80)
- Jun 13-17, Reykjavik, Iceland, FPSAC 2011 - 23rd Annual International Conference on Formal Power Series and Algebraic Combinatorics
- May 31-Jun 3, Victoria, BC, Canada, 3rd Canadian Discrete and Algorithmic Mathematics Conference (CanaDAM)
- May 26-29, Wilfrid University, Waterloo, ON, Canada, Waterloo Workshop in Computer Algebra 2011 and W80 (in honor of Herb Wilf's 80th birthday)
- May 24-29, Atlanta, GA, 15th International Conference on Random Structures and Algorithms (May 24-28), and 8th Workshop on Algorithms and Models for the Web Graph - WAW 2011 (May 28-29)
- May 23-29, IASI-CNR, Rome, Polymatroids (lectures by Jack Edmonds)
- May 18-19, Queen Mary (University of London), and London School of Economics and Political Science, Two One-Day Colloquia in Combinatorics 2011
- May 17-19, Caesarea Rothschild Institute, University of Haifa, Haifa, Israel, 11th Haifa Workshop on Interdisciplinary Applications of Graph Theory, Combinatorics, and Algorithms
- May 13-14, University of Ottawa, Ottawa, Canada, Ottawa-Carleton Discrete Mathematics Days 2011
- May 12-14, University of Louisville, Louisville, KY, 24th Cumberland Conference on Combinatorics, Graph Theory, and Computing
- May 7, Nassau Community College, Garden City, NY, Graph Theory Day 61
- May 6-7, Ryerson University, Toronto, Canada, 19th Ontario Combinatorics Workshop (OCW'19)
- May 5-8, University HassanII Mohammedia-Casablanca, International Conference on Discrete Mathematics and Computer Science (DIMACOS11)
- May 5-6, University of Memphis, Memphis, TN Erdős Lecture Series (dedicated to Richard Schelp)
- May 4-5, Acadia University, Wolfville, Nova Scotia, Canada, 7th East Coast Combinatorial Conference
- May 2-6, Institut Henri Poincaré, Paris, Pretty Structures 2011
- Apr 16-17, Sam Houston State University, Huntsville, TX CombinaTexas 2011
- Apr 16-17, Georgia Tech, Atlanta, GA, Atlanta Lecture Series in Combinatorics and Graph Theory III
- Apr 15-16, Indiana-Purdue University, Fort Wayne, IN, 51st MIdwest GrapH TheorY Meeting (MIGHTY LI) "The 275th Anniversary Conference"
- Apr 9-10, Penn State University, State College, PA, Graduate Student Combinatorics Conference (GSCC 2011)
- Apr 9, North Carolina State University, Raleigh, NC, Triangle Lectures in Combinatorics (TLC)
- Apr 4-15, Graz University of Technology, Austria, Spring School in Discrete Probability, Ergodic Theory and Combinatorics (addressed to PhD students)
- Apr 4-7, Center for Discrete Mathematics and Its Applications, University of Warwick, Warwick, UK, DIMAP Workshop on Combinatorics and Graph Theory
- Mar 28-Apr 1, Hotel Edelweiss, Bariloche, Argentina, LAGOS'11 - VI Latin-American Algorithms, Graphs, and Optimization Symposium
- Mar 22-Apr 8, Technical University Berlin, Berlin, Germany, Graduate/Postdoc course on Methods of Graph Drawing
- Mar 28-30, Antoniushaus Morschach, Switzerland, 27th European Workshop on Computational Geometry (EuroCG 11)
- Mar 21-25, American Institute of Mathematics, Palo Alto, CA, Hypergraph Turán problem
- Mar 18-20, University of Iowa, Iowa City, IA, 2011 Spring AMS Central Section Meeting #1069, special sessions in Graph Theory and in Algebraic Combinatorics
- Mar 7-11, Florida Atlantic University, Boca Raton, FL, Forty-Second Southeastern International Conference on Combinatorics, Graph Theory, and Computing
- Feb 26-27, Georgia State University, Atlanta, GA, Atlanta Lecture Series in Combinatorics and Graph Theory II
- Feb 13-18, Dagstuhl, Germany, GRASTA 2011 - 4th Workshop on GRAph Searching, Theory and Applications
- Feb 2, The Open University, Milton Keynes, UK, 12th annual Winter Combinatorics Meeting
- Jan 23-25, San Francisco, CA, ACM-SIAM Symposium on Discrete Algorithms (SODA11)
- Jan 22, San Francisco, CA, ANalytic ALgorithmics and COmbinatorics -- ANALCO'11
- Jan 21-23, Emory University, Atlanta, GA, Partitions, q-series, and Maass forms
- Jan 21-23, Lakehead University, Thunder Bay, Ontario, Canada, Combinatorial Algebra meets Algebraic Combinatorics (Eighth Annual Meeting)
- Jan 11, LIAFA, Paris, France, one-day conference on Structural Graph Theory

Conferences in 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000-1997.

If anyone wants to create such a site for a conference series, I can post that person's emai address so that past attendees can send material (printed material saved by attendees can be scanned and posted). Good candidates for such sites would be EuroComb, AWOCA (Australasian Worshop on Combinatorial Algorithms), CTW (Graphs and Combinatorial Optimization), Ontario Combinatorics Workshops, the Cumberland Conference on Combinatorics and Computing, the MCCCC, the Southeastern International Conferences, Graph Theory Day in New York, etc. I'm sure there are also many other series that would benefit from having such sites.

- ACCOTA (Combinatorial and Computational Aspects of Optimization, Topology and Algebra)
- ACCMCC (Australasian Conferences in Combinatorial Mathematics and Combinatorial Computing)
- BADMath (Bay Area Discrete Mathematics Days)
- BCC (British Combinatorial Conferences)
- C&C (Workshop on Cycles & Colourings - High Tatras)
- CIG (Computational Intelligence and Games
- Clemson Mini-Conference on Discrete Mathematics and Algorithms
- COCOON (Combinatorics and Computing) (maintained by Michael Ley)
- Combinatorial Potlatch (Puget Sound area, maintained by Rob Beezer)
- CoNE - Combinatorists of New England (series ended after 45 meetings - archive by Ruth Haas)
- CombinaTexas (maintained by Catherine Yan)
- DIMACS Reconnect Conferences
- DIMACS Special Years, all DIMACS Workshops
- Discrete Mathematics in New England (maintained by Karen Collins)
- Discrete Mathematics Days in the Northeast (maintained by Karen Collins)
- FPSAC (Formal Power Series and Algebraic Combinatorics)
- GD (Graph Drawing) (maintained by Roberto Tamassia)
- IWOCA (International Workshop on Combinatorial Algorithms)
- LATIN (Latin American Theoretical INformatics
- MCCCC (Midwest Conference on Combinatorics, Cryptography and Computing) (maintained by Ralucca Gera)
- MIGHTY (MIdwest GrapH TheorY) (maintained by Jay Bagga)
- MOPTA (McMaster Optimization Conference)
- MSRI Workshops (Mathematical Sciences Research Institute
- NSF-CBMS Regional Research Conferences (Conference Board of the Mathematical Sciences)
- Nordic Combinatorial Conference (NORCOM)
- SIAM Discrete Mathematics, SIAM Discrete Algorithms
- WADS (Workshop on Algorithms and Data Structures)
- WG (International Workshop on Graph-Theoretic Concepts in Computer Science)