This volume contains the proceedings of the 18th International Conference on Social, Cultural, and Behavioral Modeling, SBP-BRiMS 2025, which took place in Pittsburgh, Pennsylvania, USA, in October 2025.

The 23 papers presented in this volume were carefully reviewed and selected from 56 submissions. They are divided into the following themes: Advances in Tools and Theory; Data-Driven Approaches.

Another focus of the conference is on understanding, predicting, and influencing human sociocultural behavior.