This book constitutes the refereed proceedings of the 14th International Conference on Networked Systems, NETYS 2026, held in Agadir, Morocco, during June 10-12, 2026.

The 14 full papers and 1 short paper were included in this book were carefully reviewed and selected from 34 submissions. This conference covering all aspects related to data management, data science, distributed algorithms, large language models, machine learning, multi-core architectures, networks, parallel programming, security, and verification.