Links to Combinatorial Conferences

For posting of upcoming conferences to this list, send email to Douglas B. West at dwest|at|illinois.edu. Other conference lists: Combinatorics and related conferences (maintained by Keith Edwards); Graph Theory and Combinatorics (at the Conference Management System); Janos Pach's Conference List

Other links: Conference Series Archives, Open problems pages.

Conferences in 2026

Jun 2-5, Edinburgh, UK, SIAM Conference on Optimization (OP26)
Mar 4-6, Perugia, Italy, 20th International Conference and Workshops on Algorithms and Computation (WALCOM 2026)
Feb 9-13, Jagiellonian University, Krakow, Poland, 51st International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM2026) (more emphasis than usual on combinatorics)
Jan 12-13, Vancouver, Canada, Symposium on Simplicity in Algorithms (SOSA26) (Joint with ACM-SIAM Symposium on Discrete Algorithms (SODA) and SIAM Symposium on Algorithm Engineering and Experiments (ALENEX'26))

Conferences in 2025

Dec 15-17, Amrita Vishwa Vidyapeetham (Deemed to be University), Coimbatore, India, International Conference on Graph Theory and its Applications (ICGTA25)
Dec 9-12, Universidad Adolfo Ibáñez, Viña del Mar, Chile. Mixed Integer Programming Workshop South America 2025
Dec 8-10, Tainan, Taiwan, 36th International Symposium on Algorithms and Computation (ISAAC 2025) (workshop Dec 7)
Dec 1-5, Victoria University of Wellington, Wellington, New Zealand, 47th Australasian Combinatorics Conference (47ACC)
Nov 13, Tilburg University, Netherlands, Dutch Day on Optimization
Nov 10-14, Universidad de Buenos Aires, Buenos Aires, Argentina, XIII Latin American Algorithms, Graphs, and Optimization Symposium (LAGOS 2025)
Oct 28-31, Gramado, Rio Grande do Sul, Brazil, Workshop on Spectral Graph Theory 2025
Oct 25, Bologna, Italy, 16th Multidisciplinary Workshop on Advances in Preference Handling (M-PREF 2025)
Oct 24-26, National Taipei University of Business, Taoyuan, Taiwan, 2025 International Workshop on Algorithms in Engineering (IWAE 2025)
Oct 2-17, Centre de Recerca Matemàtica (CRM), Barcelona, Spain, Research school on Combinatorial Geometries and Geometric Combinatorics
Oct 1 - Nov 28, Centre de Recerca Matemàtica (CRM), Barcelona, Spain, Combinatorial Geometries and Geometric Combinatorics (intensive research program: research school, projects, seminars, conference)
Sep 24-26, Norrköping, Sweden, 33rd International Symposium on Graph Drawing and Network Visualization (GD 2025)
Sep 23-26, Trier University, Trier, Germany, International Workshop on Algorithmic Optimization
Sep 21-26, Cracow, Poland, 10th Cracow Conference on Graph Theory
Sep 18-19, Warsaw, Poland, Workshop on Approximation and Online Algorithms (WAOA 2025)
Sep 15-19, TU Freiberg, Saxony, Germany. Ukranian Summer school in Combinatorics 2025
Sep 15-17, University of Warsaw, Warsaw, Poland, 33rd Annual European Symposium on Algorithms (ESA 2025)
Sep 12-14, Guangzhou, China, 27th China-Japan Conference on Discrete and Computational Geometry, Graphs, and Games (CJCDCG³ 2025)
Sep 11-12, Technical University of Munich, Straubing, Germany, Recent Advances in Multi-Objective Optimization (RAMOO)
Sep 8-11, City University of London, London, UK, 32nd International Symposium on String Processing and Information Retrieval (SPIRE 2025)
Sep 7-13, Poertschach, Austria, Summer school "Discrete Random Structures" (DRS 2025)
Sep 7-13, University of Primorska, Koper, Slovenia, 12th PhD Summer School in Discrete Mathematics
Sep 2-5, University of Bath in Bath, U.K, 18th International Symposium on Algorithmic Game Theory (SAGT)
Sep 2-3, University of Liverpool, Liverpool, UK, Liverpool Discrete Mathematics Colloquium
Sep 1-2, Nottingham Trent University, Nottingham, UK, Workshop on Random Simplicial Complexes and Hypergraphs (WoRSCH 2025)
Aug 31 - Sep 5, Starý Smokovec, High Tatras, Slovakia, 33rd Cycles and Colourings Workshop (C&C 2025)
Aug 25-29, University of Primorska, Koper, Slovenia, GAP Days Summer 2025
Aug 28 - Sep 2, Technische Universität Braunschweig, Braunschweig, Germany, Summer School on Nonlinear Optimization and Combinatorics
Aug 25-29, Budapest, Hungary, European Conference on Combinatorics, Graph Theory and Applications (Eurocomb '25)
Aug 25-27, Prague, Czech Republic, 28th Prague Stringology Conference (PSC 2025) (plus StringMasters workshop Aug 28)
Aug 25-27, hosted in Haifa, Israel, 4th International Conference on Enumerative Combinatorics and Applications (ICECA 2025) (VIRTUAL)
Aug 15-17, Chengdu, China, 31st International Computing and Combinatorics Conference (COCOON 2025)
Aug 12-15, University of Glasgow, Glasgow, Scotland, United Kingdom, 18th International Symposium on Combinatorial Search (SoCS 2025), co-located with 31st International Conference on Principles and Practice of Constraint Programming (CP 2025) and 28th International Conference on Theory and Applications of Satisfiability Testing (SAT 2025); also various workshops on Aug 10-11
Aug 11-15, York University, Toronto, Canada, 37th Canadian Conference on Computational Geometry (CCCG 2025) (co-located with 19th Algorithms and Data Structures Symposium (WADS 2025))
Aug 11-13, University of California, Berkeley, CA, 29th International Conference on Randomization and Computation (RANDOM 2025) and 28th International Conference on Approximation Algorithms for Combinatorial Optimization Problems (APPROX 2025)
Aug 6-10, Ohrid, Macedonia, 9th Macedonian Workshop on Applied Mathematics and Graph Theory
Aug 5-6, Bahçeşehir University, Istanbul, Turkey, Combinatorics and Geometry in Istanbul (CGI 2025)
Aug 4-8, TU Wien, Vienna, Austria, 22nd International Conference on RANDOM STRUCTURES & ALGORITHMS (RS&A 2025)
Aug 4-6, RWTH Aachen University, Aachen, Germany, 28th Workshop on Future Research in Combinatorial Optimization (FRICO)
Jul 30 - Aug 1, Montréal, Québec, Canada, SIAM Conference on Applied and Computational Discrete Algorithms (ACDA25)
Jul 21-25, Hokkaido University, Sapporo, Japan, 37th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2025)
Jul 21-24, Montana State University, Bozeman, MT, 36th International Workshop on Combinatorial Algorithms (IWOCA 2025)
Jul 14-18, University of Queensland, St. Lucia (Brisbane), Australia, Algebraic Combinatorics, Special Functions, and Representation Theory (celebrating Ole Warnaar's 60th birthday)
Jul 7-11, University of St. Andrews, St. Andrews (Scotland), United Kingdom, Permutation Patterns 2025 (accompanying workshop Jul 4-5
Jul 7, Aarhus University, Denmark, Graph Width Parameters: from Structure to Algorithms (GWP 2025) (Satellite Workshop of ICALP 2025)
Jul 1-3, University of Clermont Auvergne, Clermont-Ferrand, France, 2025 Mixed Integer Programming (MIP) European Workshop
Jun 30 - Jul 4, Nouan-le-Fuzelier, France, Summer School on Graph Theory (SGT2025)
Jun 30 - Jul 4, LORIA, Nancy, France, WORDS 2025
Jun 30 - Jul 3, Universidad de Catabria, Santander, Spain, XXI Spanish Meeting on Computational Geometry
Jun 30 - Jul 3, Vilnius University, Vilnius, Lithuania, 20th Workshop on Modelling and Mining Networks (WAW 2025)
Jun 26-27, Freie Univesitat, Berlin, Germany, The Simplex Method: Theory, Complexity, and Applications
Jun 23-28, Kranjska Gora, Slovenia, Combinatorics around the q-Onsager Algebra (celebrating the 70th birthday of Paul Terwilliger)
Jun 23-27, Rzeszów University of Technology, Rzeszów, Poland, Rzeszów Workshop on Graph Theory
Jun 23-27, Eötvös Loránd University, Budapest, Hungary, Summer School on Algorithms
Jun 23-27, Kanazawa, Japan, 41st International Symposium on Computational Geometry (SoCG 2025)
Jun 22-27, Trencianske Teplice, Slovakia, Graph Embeddings and Maps on Surfaces (GEMS 2025)
Jun 22-25, University of Leeds, Leeds, UK, 34th European Conference on Operational Research (EURO 2025)
Jun 17-19, Milan, Italy, 36th Annual Symposium on Combinatorial Pattern Matching (CPM 2025)
Jun 16-18, Reykjavik, Iceland, 15th Nordic Combinatorial Conference (NORCOM 2025)
Jun 15-27, University of Vermont, Burlington, VT, Graduate Research Workshop in Combinatorics (GRWC 2025)
Jun 11-13, Europäische Akademie Otzenhausen, Otzenhausen, Germany, 51st International Workshop on Graph-Theoretic Concepts in Computer Science (WG2025)
Jun 11-13, Johns Hopkins University, Baltimore, MD, 26th Conference on Integer Programming and Combinatorial Optimization (IPCO 2025)
Jun 10-12, LUISS University, Rome, Italy, 14th International Symposium on Algorithms and Complexity (CIAC 2025)
Jun 7-10, Cochin University of Science and Technology, Cochin, India, Twenty First Annual Conference of the Academy of Discrete Mathematics and Its Applications (ADMA) and International Conference on Discrete Mathematics (ICDM) (ADMA-ICDM 2025) (brochure here)
Jun 4-6, ETH Zurich, Zurich, Switzerland, 10th IGAFIT Highlights of Algorithms conference (HALG 2025)
Jun 4, Université Paris Dauphine, Paris, France, 45th Ile-de-France Operation Research Day (JFRO) (focused on Graph Coloring)
Jun 3-6, University of Minnesota, Minneapolis, MN, 22nd Mixed Integer Programming Workshop (MIP 2025)
Jun 2-5, Georgia Tech, Atlanta, GA, Summer School on Linear Program Solvers
Jun 1-6, Kalamata, Greece, 5th Pythagorean Conference
May 31 - Jun 1, City University of Hong Kong, Hong Kong, China, 16th Annual Meeting of Asian Association for Algorithms and Computation (AAAC 2025)
May 29-30, hosted by University of Waterloo, Waterloo, Canada, 6th Algebraic Combinatorics Virtual Expedition (AlCoVE) (VIRTUAL, via Zoom and gather.town)
May 28-29, Shahid Rajaee Teacher Training University, Tehran, Iran, 13th Graph Theory and Algebraic Combinatorics Conference (13GTACC)
May 27-31, Iowa State University, Ames, IA, Summer School on Topological Methods in Combinatorics
May 27, University of Oxford, Oxford, UK, One-Day Meeting in Combinatorics
May 26-30, Seville, Spain, 8th Workshop on Design Theory, Hadamard Matrices and Applications (Hadamard-2025)
May 24-25, Ottawa, Ontario, Canada, 28th Ontario Combinatorics Workshop (OCW) (following CanaDAM)
May 20-23, Ottawa, Ontario, Canada, Canadian Discrete and Algorithmic Mathematics Conference (CanaDAM 2025)
May 17-18, Auburn University, Auburn, AL, 34th Cumberland Conference on Combinatorics, Graph Theory, and Computing
May 14-17, University of Georgia, Athens, GA, Integers Conference 2025 (honoring the 80th birthdays of Melvyn Nathanson and Carl Pomerance
May 8-10, Marrakech, Morocco, 38th Conference of the European Chapter on Combinatorial Optimization (ECCO'2025)
May 8, University of Delaware, Newark, DE, Delaware Miniworkshop on Discrete Mathematics
May 7-8, Queen Mary (May 7) and University College (May 8), London, 18th London Colloquia in Combinatorics
May 5-9, International Center for Theoretical Physics, Trieste, Italy, Conference on Mixing times between Probability, Computer Science and Statistical Physics
Apr 30 - May 2, Birmingham, UK, 5th IMA-ORS Conference on the Mathematics of Operational Research
Apr 28-29, University of Glasgow, Glasgow, UK, 2025 Scottish Combinatorics Meeting (followed by Postgraduate Combinatorics Conference (PCC 2025) Apr 30 to May 2)
Apr 25, hosted by Novosibirsk State University, Novosibirsk, Russia, 4th workshop on Domination Theory and its Applications (VIRTUAL on Zoom)
Apr 23-25, Trieste, Italy, 25th European Conference on Evolutionary Computation in Combinatorial Optimisation (EvoCOP 2025)
Apr 21-25, Simons Laufer Mathematical Sciences Institute, Berkeley, CA, Detection, Estimation, and Reconstruction in Networks
Apr 19, North Carolina State University, Raleigh, NC, 26th Triangle Lectures in Combinatorics
Apr 9-11, Liblice, Czech Republic, 41st European Workshop on Computational Geometry (EuroCG 2025)
Apr 7-9, University of Groningen, Netherlands, Workshop On Randomness and Discrete Structures (WORDS 2025)
Apr 5-6, University of Illinois, Chicago, IL, 10th Lake Michigan Workshop on Combinatorics and Graph Theory
Mar 29-30, hosted by Ahmedabad University, Ahmedabad, India, COmbinatorial Number Theory And Connected Topics (CONTACT-IV) (VIRTUAL)
Mar 25-26, TU Delft, Delft, Netherlands, Dutch Days of Combinatorics (DDoC 2025)
Mar 17-21, Simons Laufer Mathematical Sciences Institute, Berkeley, CA, Algebraic and Analytic Methods in Combinatorics
Mar 17-18, Magdalene College, Cambridge, United Kingdom, 13th EAI International Conference on Game Theory for Networks (GameNets 2025)
Mar 10-14, IMPA, Rio de Janeiro, Brazil, 2nd EBC - Brazilian School of Combinatorics
Mar 6-7, Tilburg University, Tilburg, Netherlands, 15th Day on Computational Game Theory (CGT)
Mar 3-7, Florida Atlantic University, Boca Raton, FL, 56th Southeastern International Conference on Combinatorics, Graph Theory, and Computing
Feb 28 - Mar 2, Chengdu, China, 19th International Conference and Workshops on Algorithms and Computation (WALCOM 2025)
Feb 24 - Mar 7, Indian Institute of Technology, Dharwad, India, short course "Sparse graphs: treewidth, planarity, bounded expansion"
Feb 24-28, University of Osnabrück, Osnabrück, Germany, Winter School and Workshop on Polytopes 2025
Feb 13-15, PSG College of Technology, Coimbatore, India, 11th Annual International Conference on Algorithms and Discrete Applied Mathematics (CALDAM 2025)
Feb 10-14, IPAM, UCLA, Los Angeles, CA, Computational Interactions between Algebra, Combinatorics, and Discrete Geometry (ACD2025)
Feb 10-14, Simons Laufer Mathematical Sciences Institute, Berkeley, CA, Introductory Workshop: Graph Theory: Extremal, Probabilistic, and Structural
Feb 6-7, Simons Laufer Mathematical Sciences Institute, Berkeley, CA, Connections Workshop: Extremal Combinatorics
Feb 6-7, City, University of London, UK, Sequences in London
Feb 5, King's College, London, UK 29th London Stringology Days & London Algorithmic Workshop (LSD & LAW) for Costas (celebrating Costas Iliopoulos)
Jan 27-31, Simons Laufer Mathematical Sciences Institute, Berkeley, CA, Introductory Workshop: Probability and Statistics of Discrete Structures
Jan 23-24, Simons Laufer Mathematical Sciences Institute, Berkeley, CA, Connections Workshop: Probability and Statistics of Discrete Structures
Jan 12-15, New Orleans, LA, ACM-SIAM Symposium on Discrete Algorithms (SODA25)
Jan 8-10, Kolkata, India, International Conference on Applied Algorithms (ICAA)
Jan 6-10, University of Chile, Viña del Mar, Chile XX Summer School in Discrete Mathematics
Jan 6-10, Institute for Basic Science, Seoul, Korea, Recent developments in probabilistic combinatorics: New synergies (Winter School, streamed over Zoom)

Conference Series Archives

Archive sites for conference series provide a valuable record. Links for several appear below. These also may have expired for conference series that are now defunct. Archives may include such things as lists of talks, participants, and abstracts; even sometimes photos. If anyone knows of archive sites for other conference series in discrete mathematics, please let me know (send information to dwest(at)illinois(dot)edu). There are many other conference series that would benefit from having archive sites; any volunteers?

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) (maintained by Keith Edwards)
C&C (Workshop on Cycles & Colourings - High Tatras)
CanaDAM - Canadian Discrete and Algorithmic Mathematics Conference
Cascadia Combinatorial Feast (formerly Combinatorial Potlatch; Puget Sound area)
CAAC (Combinatorial Algebra meets Algebraic Combinatorics)
CIG (Computational Intelligence and Games
Clemson Mini-Conference on Discrete Mathematics and Algorithms
COCOON (Combinatorics and Computing) (maintained by Michael Ley)
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)
International Conference on Permutation Patterns
IWOCA (International Workshop on Combinatorial Algorithms)
LAGOS (Latin and American Algorithms, Graphs and Optimization Symposium
LATIN (Latin American Theoretical INformatics
LAWCG (Latin American Workshop on Cliques in Graphs)
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)
One World Combinatorics on Words Seminar
Séminaire Lotharingien de Combinatoire (maintained by Christian Krattenthaler)
SIAM Discrete Mathematics, SIAM Discrete Algorithms
WADS (Workshop on Algorithms and Data Structures)
WG (International Workshop on Graph-Theoretic Concepts in Computer Science)