This book constitutes the proceedings of the 25th International Conference on Passive and Active Measurement, PAM 2024, held as a virtual event from March 11-13, 2024. The 14 full papers and 13 short papers presented in this volume were carefully reviewed and selected from 64 submissions. The papers are organized in the following topical sections: Network Security, Routing, Satellite Networks, Topology, Transport Protocol and User Privacy.