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This book constitutes the refereed proceedings of the 9th International Conference on Graph Transformation, ICGT 2016, held as part of STAF 2016, in Vienna, Austria, in July 2016.
The 14 papers presented in this were carefully reviewed and selected from 33 submissions. They were organized in topical sections named: foundations, tools and algorithms, queries, and applications.
The book also contains one keynote paper in full paper length. The book is dedicated to Hartmut Ehrig, one of the fathers and most productive members of the Graph Transformation community, who passed away in 2016. An obituary is included in the front matter of the volume.

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Keynote.- Complexity Is the Only Constant: Trends in Computing and Their Relevance to Model Driven Engineering.- Foundations .- Sesqui-Pushout Rewriting with Type Refinements.- Parallelism in AGREE Transformations.- Model Checking Reconfigurable Petri Nets with Maude.- Tools and Algorithms .- A Software Package for Chemically Inspired Graph Transformation.- A Tool Environment for Managing Families of Model Transformation Rules.- Compiling Graph Programs to C.- An Algorithm for the Critical Pair Analysis of Amalgamated Graph Transformations.- Queries .- Rete Network Slicing for Model Queries.- An SQL-Based Query Language and Engine for Graph Pattern Matching.- On the Operationalization of Graph Queries with Generalized Discrimination Networks.- Applications .- The Incremental Advantage: Evaluating the Performance of a TGG-based Visualisation Framework.- Automatic Inference of Graph Transformation Rules Using the Cyclic Nature of Chemical Reactions.- Using Graph Transformation for Puzzle Game Level Generation and Validation.- Graph Transformation Meets Reversible Circuits: Model Transformation and Optimization.

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