The Eighth International Conference on Algorithmic Decision Theory has been held on October 14-16, 2024 in the Center for Discrete Mathematics and Theoretical Computer Science (DIMACS) at Rutgers University, Piscataway, NJ, USA. The general chairs have been David Pennock and Lirong Xia, and the program chairs have been Rupert Freeman and Nicholas Mattei. The program has included 26 papers on topics such as game theory and decision making, preference theory, voting theory, as well as allocations, matching, clustering, and facility location. Furthermore, ADT 2024 has featured three invited talks: Jenn Wortman Vaughan (Microsoft Research) has explored the impact of uncertainty expression on decision making with generative AI, Tracy Liu (Tsinghua University) has discussed economic rationality of humans and AI, and Hervé Moulin (University of Glasgow) has shown how to divide a commons with tight guarantees. As in previous years, the conference proceedings were published as a volume of Springer’s Lecture Notes of Artificial Intelligence.