Links to Combinatorial Conferences

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

Other links: Conference Series Archives, Open problems pages.

Online seminars

Combinatorial Mathematics Society of Australia, Ongoing online seminar (biweekly Wednesdays)

Conferences in 2021

Nov 19-20, Paderborn University, Paderborn, Germany, 39th Colloquium on Combinatorics (Kolkom 2020) (postponed from Nov 20-21, 2020)
Nov 14, University of North Carolina, Greensboro, NC, 20th Triangle Lectures in Combinatorics" (ON-LINE, hosted on Zoom)
Sep 20-24, Apolda, Germany, GPCO 2020 - 8th German-Polish Conference on Optimization (postponed from 2020)
Jul 20-23, Spokane, WA, 20th SIAM Conference on Discrete Mathematics (DM21)
Jul 12-16, International Centre for Mathematical Sciences, Edinburgh, UK, Young Researchers in Combinatorics Workshop (postponed from Jul 19-25, 2020)
Jun 20-26, Portoroz, Slovenia, 8th European Congress of Mathematics (postponed from 2020)
Jun 14-18, Rytro, Poland, Ninth Cracow Conference on Graph Theory
Jun 7-11, Ljubljana, Slovenia, Ljubljana Workshop on Graph Domination 2021 - LWGD'21 (postponed from Jun 8-12, 2020)
May 19-21, Georgia Institute of Technology, Atlanta, GA, Conference on Integer Programming and Combinatorial Optimization (IPCO XXII)
May 17-21, Sao Paulo, Brazil, XI Latin and American Algorithms, Graphs and Optimization Symposium
May 10-12, Larnaca, Cyprus, 12th International Conference on Algorithms and Complexity (CIAC 2021)
Feb 28 - Mar 2, University of Information Technology, Yangon, Myanmar, 15th International Conference and Workshops on Algorithms and Computation (WALCOM 2021)
Feb 11-13, IIT Ropar, India, 7th Annual International Conference on Algorithms and Discrete Applied Mathematics (CALDAM 2021) (presentations optionally online)
Jan 6-9, Washington, DC, HELD VIRTUALLY, 2021 Joint Mathematics Meetings (JMM)

Conferences in 2020

Postponements and cancellations due to coronavirus indicated as received.

Dec 16-19, Amrita Vishwa University, Coimbatore, India, International Conference on Graph Theory and its Applications (ICGTA20) (POSTPONED to Dec 2021)
Dec 14-18, University of Melbourne, Melbourne, Australia, 43rd Australasian Combinatorics Conference (43ACC) (POSTPONED to Dec 2021)
Dec 14-18, On-line, 31st International Symposium on Algorithms and Computation (ISAAC 2020)
Dec 11-14, Rajagiri School of Engineering and Technology, Kochi, India, International Conference on Number Theory and Discrete Mathematics (ICNTDM 2020) (held ONLINE via Google meet)
Dec 8-11, University of New England, Armidale, Australia, Australian Math Society Meeting (Section on Combinatorics and Graph Theory)
Nov 20-21, Paderborn University, Paderborn, Germany, 39th Colloquium on Combinatorics (Kolkom 2020) (POSTPONED to Nov 19-20, 2021)
Nov 4-7, Los Andes, Chile, IX Latin-American Workshop on Cliques in Graphs (LAWCG 2020)
Oct 16-18, University of Nevada, Las Vegas, NV 34th Midwest Conference on Combinatorics and Combinatorial Computing (MCCCC) (POSTPONED TO OCTOBER 2021)
Oct 13-15, Orlando, FL, 27th International Symposium on String Processing and Information Retrieval (SPIRE 2020)
Oct 9-12, Budva, Montenegro, Third Montenegrin Symposium on Geometry, Graphs, Informatics and Algebra (MESIGMA 2020)
Oct 1-4, Augusta University, Augusta, Georgia, Integers Conference 2020
Sep 23-25, with worldwide sponsors, Probabilistic Combinatorics Online 2020
Sep 23-25, Niterói, RJ, Brazil, Workshop on Spectral Graph Theory 2020 (honoring the 70th birthday of Nair Abreu)
Sep 21-24, SGH Warsaw School of Economics, Warsaw, Poland, 17th Workshop on Algorithms and Models for the Web Graph (WAW 2020) (VIRTUAL, see https://math.ryerson.ca/waw2020/schedule.html, postponed from Jun 18-19)
Sep 17-23, Rhodes, Greece, Symposium GRAPHS, within ICNAAM 2020 (International Conference of Numerical Analysis and Applied Mathematics 2020). Contact vojpet@dmi.uns.ac.rs or vojpet@gmail.com
Sep 16-18, University of British Columbia, Vancouver, BC, Canada, 28th International Symposium on Graph Drawing and Network Visualization (ONLINE)
Sep 16-18, Augsburg, Germany, 13th International Symposium on Algorithmic Game Theory (SAGT 2020) (VIRTUAL conference, same dates)
Sep 14-18, Bedlewo, Poland, 8th Polish Combinatorial Conference (ONLINE, same dates)
Sep 14-16, Ischia, Italy, CTW2020: 18th Cologne-Twente Workshop on Graphs and Combinatorial Optimization (ONLINE, postponed from Jun 15-17)
Sep 7-9, Pisa, Italy, 28th Annual European Symposium on Algorithms (ESA 2020)
Sep 6-11, Nový Smokovec, High Tatras, Slovakia, 29th Workshop Cycles and Colourings (C&C2020) (POSTPONED to Sep 5-10, 2021)
Sep 6-8, Rényi Institute, Budapest, Hungary, Rényi Institute 70th Anniversary and Conference
Aug 31 - Sep 4, Goethe Universität, Frankfurt, Germany, Inference problems: algorithms and lower bounds (VIRTUAL WORKSHOP)
Aug 24-30, ONLINE via Yekaterinburg, Russia, 2020 Ural Workshop on Group Theory and Combinatorics
Aug 24-28, Charles University, Prague, Czech Republic, Prague Summer School on Discrete Mathematics 2020 (ON-LINE ONLY)
Aug 17-20, Brno, Czech Republic, 55th Czech-Slovak Conference on Graph Theory
Aug 17-19, University of Washington, Seattle, WA, 24th International Workshop on Randomization and Computation (RANDOM 2020) and 23rd International Workshop on Approximation Algorithms for Combinatorial Optimization Problems (APPROX 2020) (both VIRTUAL)
Aug 10-14, Ohrid, Macedonia, 5th Macedonian Workshop on Graph Theory and Applications
Aug 6-8, Bishop Chulaparambil Memorial College, Kottayam, India International Conference on Graph Connections (ONLINE)
Aug 5-7, University of Saskatchewan, Saskatoon, Canada, 32nd Canadian Conference on Computational Geometry
Jul 28-31, Technical University, Ilmenau (host), Germany, online Workshop on Graph Theory and Combinatorics in Thuringia (ONLINE)
Jul 27-29, University of Aveiro, Aveiro, Portugal, Optimization 2020 (CANCELED, may be rescheduled)
Jul 20-24, Dawson College, Montreal, Canada, Workshop on Spanning Subgraphs
Jul 19-25, International Centre for Mathematical Sciences, Edinburgh, UK, Young Researchers in Combinatorics Workshop (POSTPONED to Jul 12-16, 2021)
Jul 13-18, Kranjska Gora, Slovenia, Combinatorics around the q-Onsager Algebra (a satellite conference of the 8th European Congress of Mathematics, celebrating the 65th birthday of Paul Terwilliger)
Jul 13-17, Budapest, Hungary, Graphs, Groups, Growth, and Complexity (Celebrating Laci Babai's 70th birthday)
Jul 12-17, Rijeka, Croatia, Combinatorial Designs and Codes (a satellite conference of the 8th European Congress of Mathematics) (POSTPONED to Jul 11-16, 2021)
Jul 7, Saarbrücken, Germany (ON-LINE), Algorithmic Aspects of Temporal Graphs III (ICALP 2020 Satellite Workshop)
Jul 6-10, Novosibirsk, Russia, Mathematical Optimization Theory and Operations Research (MOTOR 2020)
Jul 6-10, Pedagogical University, Kraków, Poland, Summer School in Algebraic Combinatorics
Jul 6-10, Cetraro, Italy, Algebraic Combinatorics in Cetraro
Jul 5-9, Spa, Belgium, Graphs and Optimization Meeting (GO XI) (POSTPONED to 2021)
Jul 1-8, Erice, Sicily, Italy, 5th Erice Summer School on "Graph Theory, Algorithms and Applications"
Jun 30, 9AM Eastern (US) Daylight Time, Virtual Combinatorics Colloquium (VCC) Cheryl Praeger (University of Western Australia), "Diagonal Structures and Permutation Groups" Zoom Meeting ID: 913 6952 1801 Password: 16180339
Jun 29 - Jul 4, Mt. Rogla, Slovenia, Graphs and Groups, Geometries and Gap (G2G2-Summer School) (a satellite event of the 8th European Congress of Mathematics)
Jun 29 - Jul 3, TU Wien, Vienna, Austria, Algorithmic and Enumerative Combinatorics (AEC 2020) (POSTPONED to Jun 28 - Jul 2, 2021)
Jun 29 - Jul 3, Valparaiso University, Valparaiso, IN, Permutation Patterns 2020 (18th International Conference on Permutation Patterns)
Jun 24-26, Leeds, England, UK, 46th International Workshop on Graph-Theoretic Concepts in Computer Science (ON-LINE)
Jun 22-26, Zürich, Switzerland, 36th International Symposium on Computational Geometry (SoCG 2020) (ON-LINE via Zoom)
Jun 22-24, Universita dell'Insubria, Varese, Italy, 12th Conference on Random Generation of Combinatorial Structures (GASCom 2020) (POSTPONED to September or October)
Jun 22-24, Tórshavn, Faroe Islands, SWAT 2020: 17th Scandinavian Symposium and Workshops on Algorithm Theory
Jun 17-19, Copenhagen, Denmark, 31th Annual Symposium on Combinatorial Pattern Matching (CPM 2020)
Jun 15-19, hosted ON-LINE by NIT Warangal, Warangal, India, Workshop on Recent Trends in Domination in Graphs: Algorithms, Complexity and Applications (WRTDG 2020)
Jun 15-19, Alpen-Adria-Universität, Klagenfurt, Austria, 31st International Conference on Probabilistic, Combinatorial, and Asymptotic Methods for the Analysis of Algorithms (AofA 2020) (POSTPONED or VIRTUAL)
Jun 15-19, ENS de Lyon, Lyon, France, Seymour is Seventy (POSTPONED to 2021)
Jun 12-14, Fields Institute, Toronto, Ontario, Canada, 1st Queer and Trans Mathematicians in Combinatorics Conference (QTMC) (POSTPONED to Jun 25-27, 2021)
Jun 10-12, Universidad de Cantabria, Santander, Spain, Discrete Mathematics Days 2020
Jun 8-12, Ljubljana, Slovenia, Ljubljana Workshop on Graph Domination 2020 - LWGD'20 (POSTPONED to June 7-11, 2021)
Jun 8-10, Island of Favignana, Sicily, Italy, Tenth International Conference on Fun with Algorithms (FUN 2020) (POSTPONED to June 2021)
Jun 8-10, Bordeaux, France, 31st International Workshop on Combinatorial Algorithms (IWOCA 2020) (VIRTUAL)
Jun 8-10, London School of Economics and Political Science, London, England, UK, Conference on Integer Programming and Combinatorial Optimization (IPCO XX1) (VIRTUAL by Zoom)
Jun 7-12, Clermont-Ferrand, France, Summer School in Graph Theory (SGT'20) (POSTPONED)
Jun 7-8, University of Haifa, Israel, 20th Haifa Workshop on Interdisciplinary Applications of Graphs, Combinatorics, and Algorithms (moved to ZOOM)
Jun 4-6, Steklov Mathematical Institute, St. Petersburg, Russia, 33rd Conference of the European Chapter on Combinatorial Optimization (ECCO 2020)
Jun 3-5, ETH, Zurich, Switzerland, 5th Highlights of Algorithms conference (HALG 2020) (conducted VIRTUALLY Aug 31 - Sep 2, 2020)
Jun 2-7, Paris, France, Negative Ties and Signed Graphs (special track of the 40th Sunbelt Conference)
Jun 1-5, Fondazione UniverMantova, Mantua, Italy, 21st International Conference Combinatorics 2020
Jun 1-4, Portland, OR, 20th SIAM Conference on Discrete Mathematics (DM20) (CANCELED)
Jun 1-3, Pittsburgh, PA, ACO@CMU Workshop (honoring the 70th birthday of Gérard Cornuéjols)
May 29-31, Xiamen, China, The 5th Combinatorics and Graph Theory Conference (CGT 2020)
May 29-31, Haikou, Hainan Province, China, 14th International Frontiers of Algorithmics Workshop (FAW 2020) (POSTPONED to October or November)
May 27-28, Urmia University, Urmia, Iran, 11th Conference on Graph Theory and Algebraic Combinatorics (11GTACC2020)
May 25-29, São Paulo, Brazil, 14th Latin American Theoretical Informatics Symposium (LATIN 2020)
May 25-28, Ledeč nad Sázavou, Czechia (Czech Republic), 55th Czech-Slovak Conference on Graph Theory 2020, followed by DIMEA Days 2020 in Brno
May 23-24, College of William and Mary, Williamsburg, VA, 32nd Cumberland Conference on Combinatorics, Graph Theory, and Computing (CANCELED)
May 20-31, Institute for Mathematics and its Applications (IMA), Minneapolis, MN, 7th Graduate Research Workshop in Combinatorics (GRWC 2020)
May 18-22, New Orleans, LA, 10th IEEE Workshop on Parallel / Distributed Combinatorics and Optimization (PDCO 2020)
May 18-22, University of Minnesota, Minneapolis, MN, Open Problems in Algebraic Combinatorics
May 11-15, Moscow Institute of Physics and Technology, Moscow, Russia, 2020 Moscow Conference on Combinatorics, Graph Theory and Applications (MoCCA'20)
May 11-15, Porquerolles, France, 10th GRAph Searching, Theory and Applications (GRASTA 2020) (POSTPONED to May 17-21, 2021)
May 4-6, Montreal, Canada, 6th International symposium on Combinatorial Optimization (ISCO 2020) (now VIRTUAL)
Apr 30 - May 1, University of Glasgow, Glasgow, Scotland, UK, Scottish Combinatorics Meeting 2020

Postgraduate Combinatorial Conference 2020

Apr 25-26, virtual meeting on Zoom, Albany, NY, Northeast Combinatorics Network Spring Discrete Math Day https://albany.zoom.us/j/96360181255?pwd=NXFpWFRHRlErYnNtajlVak5Rc08rUT09
Apr 25-26, North Dakota State University, Fargo, ND, 4th Great Plains Combinatorics Conference (GPCC 2020)
Apr 25, 2PM Eastern (US) Daylight Time, Virtual Combinatorics Colloquium (VCC) Peter Cameron, Four Precious Jewels: Zoom Meeting ID: https://wpi.zoom.us/j/838634036 )
Apr 21-25, AKSS, Spetses Island, Greece, Discrete Probability in Spetses
Apr 20-22, Centre de Recherches Mathématiques (CRM), Montreal, Canada, Agents behaviour in combinatorial game theory
Apr 19-25, Eastbourne, United Kingdom, LMS Research school on Graph Packing
Apr 11-12, Georgia State University, Atlanta, GA, 25th Atlanta Lecture Series in Combinatorics and Graph Theory
Apr 10-11, Texas A&M University, College Station, TX, 19th CombinaTexas Conference
Apr 7, 2PM Eastern (US) Daylight Time, Virtual Combinatorics Colloquium (VCC) (Join Meeting ID: pending) Maria Chudnovsky, Recent Progress on the Erdös-Hajnal Conjecture
Apr 4-5, University of Illinois - Chicago, Chicago, IL, 7th Lake Michigan Workshop on Combinatorics and Graph Theory
Mar 30, University of Liverpool, Liverpool, UK, Algorithmic and Combinatorial Aspects of Temporal Graph Theory (POSTPONED)
Mar 29 - Apr 4, Kloster Banz, Germany, International Conference on Algebraic Combinatorics and Applications (ALCOMA 20)
Mar 27-29, University of California, San Diego (UCSD), CA, Graduate Student Combinatorics Conference 2020
Mar 23, Bremen, Germany, Bremen-Hamburg Colloquium on Algorithms, Combinatorics and Optimization (BHACO Colloquium 2020)
Mar 16-18, University of Würzburg, Franconia, Germany, 36th European Workshop on Computational Geometry (EuroCG 2020)
Mar 13-15, University of Virginia, Charlottesville, VA, 7th Mid-Atlantic Algebra, Geometry, and Combinatorics (MAAGC) Workshop
Mar 11-12, RWTH Aachen University, Aachen, Germany, Workshop on Integer and Combinatorial Optimization
Mar 9-13, Florida Atlantic University, Boca Raton, FL, 51st Southeastern International Conference on Combinatorics, Graph Theory and Computing
Mar 7-8, University of Victoria, Victoria, BC, Canada, 2020 (32nd) Coast Combinatorics Conference
Mar 4-6, TU Dortmund University, Germany, SIGOPT 2020 International Conference on Optimization
Feb 29, University of North Carolina, Charlotte, NC, 19th Triangle Lectures in Combinatorics
Feb 18, 3pm Eastern Standard Time, Zoom Meeting ID: 463-430-866, Virtual Combinatorics Colloquium (Louis H. Kauffman, "Trivalent Graphs, Perfect Matchings, and Virtual Knot Theory"). Instructions
Feb 16-21, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran, 3rd Iranian Conference on Computational Geometry (ICCG 2020 - Feb 16), followed by 12th Winter School on Computational Geometry (Feb 17-21)
Feb 13-15, IIT Hyderabad, Hyderabad, India 6th Annual International Conference on Algorithms and Discrete Applied Mathematics (CALDAM 2020)
Feb 13-14, University of Twente, Enschede, Netherlands, 11th Day on Computational Game Theory
Feb 10-14, Rotorua, New Zealand, Symmetries of Discrete Objects
Jan 23-24, Bergen, Norway, Workshop on Graph Modification
Jan 21, 2PM Eastern (US) Standard Time, Virtual Combinatorics Colloquium (VCC) (Join Meeting ID: 870-427-125) Bijective Proof of the Alternating Sign Matrix Theorem
Jan 20-24, Monte Estoril, Portugal, 9th Winter School on Network Optimization (netopt2020)
Jan 20-21, University of Torino, Turin, Italy, Graphs and Randomness in Turin
Jan 6-10, Valparaiso, Chile, XV Summer School in Discrete Mathematics
Jan 5-8, Salt Lake City, UT 31st ACM-SIAM Symposium on Discrete Algorithms (SODA 2020)

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)
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)
International Conference on Permutation Patterns
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)
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)