This book constitutes the refereed proceedings of the 19th International Conference on Graph Transformation, ICGT 2026, held in Rennes, France, during June 29–July 3, 2026.

The 9 full papers and 4 short papers included in this book were carefully reviewed and selected from 19 submissions. The topics of the accepted papers cover a wide spectrum including new approaches to hypergraphs, improvements to the understanding of conflict analysis and parallel transformations, verification of graph transformation and of programs using graphs, and advancements in graphs for neural applications and stochastic rewriting.