During each International Congress, the ISA council is permitted to confer honorary membership onto senior colleagues who have made important contributions to the society or the subject over the years. Our current honorary members are:

• Friedrich Barth, Austria
• Frederick Coyle, United States
• Christo Deltshev, Bulgaria
• Ansie Dippenaer-Schoemann, South Africa
• William Eberhard, Costa Rica
• Rainer Foelix, Switzerland
• Robert Jackson, New Zealand
• Rudy Jocqué, Belgium
• Seppo Koponen, Finland
• Pekka Lehtinen, Finland
• Sylvia Lucas, Brazil
• Jerzy Prószyński, Poland
• William Shear, United States
• Søren Toft, Denmark
• Peter van Helsdingen, Netherlands

Late Honorary Members

• Gerd Alberti, Germany (1943-2016)
• Christa Deeleman-Reinhold, Netherlands (1930-2025)
• Eric Duffey, United Kingdom (1922-2019)
• Otto Kraus, Germany (1920-2017)
• Barbara York Main, Australia (1929-2019)
• Peter Merrett, United Kingdom (1937-2025)
• John Murphy, UK (1922-2021)
• Norman Platnick, United States (1951-2020)
• Peter Weygoldt, Germany (1933-2021)