The 2019 International Congress of Mathematicians, held in Rio de Janeiro, Brazil, was disrupted by a group of protesters who were opposed to the conference's decision to hold a session on the mathematics of gerrymandering.

The 1966 International Congress of Mathematicians, held in Moscow, was the first ICM to exclude women from the program. This decision was met with widespread criticism from the mathematical community.

The 2020 International Congress of Mathematicians, which was scheduled to be held in St. Petersburg, Russia, was canceled due to the COVID-19 pandemic.

The 2018 Joint Mathematics Meetings, held in San Diego, California, was the subject of controversy after the conference organizers decided to allow a speaker who had made controversial statements about women and minorities to present a talk.

The 2021 Joint Mathematics Meetings was held in a virtual format due to the ongoing COVID-19 pandemic.

The 2014 International Congress of Mathematicians, held in Seoul, South Korea, was the subject of controversy after the conference organizers decided to hold the conference in a country with a history of human rights abuses.

The 2022 Joint Mathematics Meetings was held in a hybrid format, with some sessions taking place in person and others taking place online.

The 2010 International Congress of Mathematicians, held in Hyderabad, India, was the subject of controversy after the conference organizers decided to hold the conference in a country with a history of religious discrimination.

The 2023 International Congress of Mathematicians was held in a fully virtual format due to the ongoing COVID-19 pandemic.

The 2006 International Congress of Mathematicians, held in Madrid, Spain, was the subject of controversy after the conference organizers decided to hold the conference in a country with a history of political repression.

The 2024 Joint Mathematics Meetings is scheduled to be held in a hybrid format, with some sessions taking place in person and others taking place online.

The 2002 International Congress of Mathematicians, held in Beijing, China, was the subject of controversy after the conference organizers decided to hold the conference in a country with a history of human rights abuses.

The 2025 International Congress of Mathematicians is scheduled to be held in a fully virtual format due to the ongoing COVID-19 pandemic.

The 1998 International Congress of Mathematicians, held in Berlin, Germany, was the subject of controversy after the conference organizers decided to hold the conference in a city with a history of anti-Semitism.

The 2026 Joint Mathematics Meetings is scheduled to be held in a hybrid format, with some sessions taking place in person and others taking place online.