The European Summer School in Logic, Language and Information (ESSLLI) is a yearly recurring event, which has been organized since 1989. An ESSLLI Summer School provides an interdisciplinary setting in which courses and workshops are offered in logic, linguistics and computer science. Courses (foundational, introductory and advanced) and workshops cover a wide variety of topics within three interdisciplinary areas of interest: language and computation, logic and language, and logic and computation. In addition to the workshops and courses there are usually four evening lectures, given by prominent researchers, on topics that are at the forefront of research in logic, language and computer science, also from wider scientific, historical, and philosophical perspectives. Its relevance to students of artificial intelligence is evident.

The event lasts two full weeks, and is traditionally held in the beginning or midst of August.  ESSLLI attracts  every year around 400 participants from all parts of Europe, as well as from North and Latin America, and Asia.  Participation by people from economically weaker countries is made possible by ESSLLI funding. The ESSLLI has become the main meeting place for young researchers and students in logic, linguistics and computer science to discuss current research and to share knowledge. The event is unique in its interdisciplinary set up, with no equivalents in Europe. It is organized under the auspices of the Association for Logic, Language and Information (FoLLI).

In addition to regular courses and workshops, 4 evening lectures are organized. Since 2018, one of the evening lectures is the Dick Oehrle Memorial Lecture. All evening lectures are open to the general public. Since 1996, PhD and advanced students have their own daily meeting place at ESSLLI's student session, organized by and for the students, and with its own yearly prizes.

The Beth Prize award ceremony and lecture is organized by the FoLLI board. All ESSLLI participants are welcome to attend.

The FoLLI Annual General Meeting is organized by the FoLLI board. All ESSLLI participants are members of the FoLLI association and are thus welcome to attend.

During the last 6 years ESSLLI was organized in: