This file contains information on plenary and invited speakers of the International Congress of Mathematicians (ICM). All speaker names and congress dates up to the ICM-2014 were extracted programmatically in February 2018 from the Wikipedia website ‘List of International Congresses of Mathematicians Plenary and Invited Speakers’ (https://en.wikipedia.org/w/index.php?title=List_of_International_Congresses_of_Mathematicians_Plenary_and_Invited_Speakers). The data was further enriched with gender, country of citizenship, date of birth and employer using Wikidata. For speakers invited to the ICM 2018 in Rio de Janeiro, we extracted their names, country of citizenship and the ICM sections of their talks from the official ICM 2018 website. Using the Python package gender-guesser the gender of the speakers was inferred using their forenames when this information was missing. For speakers whose names are not highly correlated with only one gender (across different countries and languages), and for which gender-guesser hence did not produce a definite gender assignment, this information was filled manually, mainly based on field knowledge and Internet research. The assignment of talks to ICM sections was performed using data from the International Mathematical Union (https://www.mathunion.org/icm-plenary-and-invited-speakers). For various authors, in particular for all women, missing demographic information was filled manually.