| n° | date | location | President | Past-President | Vice-President | Secretary General | Treasurer | Executive Members | |
| 32 | December 2015 | Berlin, Germany |
Hiroyuki Takeda | - | Regine Jahn | L.S. Shashidhara | Santiago Merino | +4 Executive Members | |
| 31 | July 2012 | Suzhou, China |
Nils Chr. Stenseth | - | Yury Dgebuadze, Zhibin Zhang |
Hiroyuki Takeda | Santigo Merino | +6 Executive Members | |
| 30 | October 2009 | Cape Town, South Africa |
Giorgio Bernardi | John Buckeridge | John Jungck, Zhibin Zhang |
Jean-Marc Jallon | Annelies Pierrot-Bults | +12 Executive Members | |
| 29 | May 2007 | Washington DC, USA |
John Buckeridge | Motonori Hoshi | Giorgio Bernardi, Jean-Marc Jallon |
Christoph Scheidegger | Erwin Beck | +13 Executive Members | |
| 28 | January 2004 | Cairo, Egypt |
Motonori Hoshi | Marvalee H. Wake | Braulio Ferreria de Souza Dias, Subhash C. Lakhotia |
Christoph Scheidegger | Erwin Beck | +12 Executive Members | |
| 27 | November 2000 | Naples, Italy |
Marvalee H. Wake | Jean-Claude Mounolou | Motonori Hoshi, José Galizía Tundisi |
Peter Whittaker / Giorgio Bernardi | Osmo O.P. Hänninen | +14 Executive Members | |
| 26 | Nov. 1997 | Taipei, Taiwan |
Jean-Claude Mounolou | David L. Hawksworth | Chang-Hung Chou, José Galizía Tundisi |
Marvalee H. Wake | Osmo O.P. Hänninen | +14 Executive Members | |
| 25 | Sept. 1994 | Paris, France |
David L. Hawksworth | Francesco Di Castri | Tokindo Okada, Vladimir E. Sokolov |
Marvalee H. Wake | Ernst-Detlef Schulze | +13 Executive Members | |
| 24 | Sept. 1991 | Amsterdam, Netherlands |
Francesco Di Castri | János Salánki | Tokindo Okada, Vladimir E. Sokolov |
Donald E. Stone | Derek F. Roberts | ||
| 23 | Oct. 1988 |
Canberra, Australia |
János Salánki | Otto T. Solbrig | W. David L. Ride, Francesco Di Castri |
Grégoire Nicolis | Derek F. Roberts | ||
| 22 | Sept. 1985 | Budapest, Hungary |
Otto T. Solbrig | Paolo Fasella | W. David L. Ride, János Salánki |
Francesco Di Castri | Derek F. Roberts | ||
| 21 | Aug. 1982 |
Ottawa, Canada |
Paolo Fasella | Eduardo De Robertis | W. David L. Ride, Otto T. Solbrig |
W. David L. Ride, Otto T. Solbrig |
Claude Lévi | ||
| 20 | Aug. 1979 |
Helsinki, Finland |
Eduardo De Robertis | Nils Oker-Blom | M.S. Ghilarov, Paolo Fasella |
Edward S. Ayensu | Edward S. Ayensu | ||
| 19 | Aug./ Sept. 1976 |
Bangalore, India |
Nils Oker-Blom | Knut Faegri | Eduardo De Robertis, M.S. Ghilarov |
Edward S. Ayensu | Edward S. Ayensu | ||
| 18 | Sept. 1973 | Ustaoset, Norway |
Knut Faegri | Donald S. Farner | Frans A. Stafleu, Nils Oker-Blom |
Christopher Wright | Karl Egle | ||
| 17 | Oct. 1970 |
Washington, D.C., USA |
Donald S. Farner | I. Malek, Frans A. Stafleu |
Knut Faegri | Karl Egle | |||
| 16 | Sept. 1967 | Montreux, Switzerland |
Donald S. Farner | C.H. Waddington | J.G. Baer, I. Malek |
Frans A. Stafleu | Karl Egle | ||
| 15 | July 1964 |
Prague, Czechoslovakia |
C.H. Waddington | Giuseppe Montalenti | J.G. Baer | D. S. Farner | Frans A. Stafleu | ||
| 14 | July 1961 |
Amsterdam, Netherlands |
C.H. Waddington | Giuseppe Montalenti | P. Chouard | G.L. Stebbins | J. Lanjouw |  |
|
| 13 | 1958 | London, England |
Giuseppe Montalenti | P. Chouard | G.L. Stebbins | J. Lanjouw | |||
| 12 | April 1955 |
Rome, Italy |
S. Horstadius | R.E. Cledland | Giuseppe Montalenti | J. Lanjouw | |||
| 11 | Aug. 1953 |
Nice, France |
S. Horstadius | H. Munro Fox | R.E. Cledland | Giuseppe Montalenti | A. Linder | ||
| 10 | July 1950 |
Stockholm, Sweden |
H. Munro Fox | M.J. Sirks | J. Runnström | Paul Vayssiere | Francis Chodat | ||
| 9 | July 1947 |
Copenhagen, Denmark |
M.J. Sirks | E.D. Merrill | H. Munro Fox | Paul Vayssiere | Francis Chodat | ||
| 8 | Sept. 1935 |
Amsterdam, Netherlands |
E.D. Merrill | A.C. Seward | M.S. Watson | M.J. Sirks | Arnold Picket | ||
| 7 | July 1931 |
Brussels, Belgium |
A.C. Seward | F.W. Went | E. Godewski | M. De Selys-Longchamps | Arnold Pictet | ||
| 6 | July 1928 |
Brussels, Belgium |
F.W. Went | Léon Fredericq | F. Botatazzi, Odón De Buen, B. Neme, A. Lameer, E. Terroine |
M. De Selys-Longchamps | --- | ||
| 5 | July 1927 |
Geneva, Switzerland |
--- | --- | --- | --- | |||
| 4 | May 1926 |
Paris, France |
Léon Fredericq | G. Fano, J. Briquet, A. Mayer, F.W. Went |
Emile Faure-Fremiet | Arnold Pictet | |||
| 3 | July 1925 |
Brussels, Belgium |
Léon Fredericq | G. Fano, J. Briquet, A. Mayer, F.W. Went |
Emile Faure-Fremiet | --- | |||
| 2 | July 1922 |
Brussels, Belgium |
Léon Fredericq | Marie-Yves Delage | E. H. Starling | Charles Flahault | --- | ||
| 1 | July 1919 |
Brussels, Belgium |
Marie-Yves Delage | W. Bateson | Charles Flahault | --- | |
