This book constitutes the refereed proceedings of the19th European Conference on Genetic Programming, Euro GP 2016, held in Porto, Portugal, in March/April 2016 co-located with the Evo*2016 events: Evo COP, Evo MUSART, and Evo Applications.The 11 revised full papers presented togetherwith 8 poster papers were carefully reviewed and selected from 36 submissions. The wide range of topics in this volume reflects the current state of researchin the field. Thus, we see topics as diverse as semantic methods, recursiveprograms, grammatical methods, coevolution, Cartesian GP, feature selection, metaheuristics, evolvability, and fitness predictors; and applicationsincluding image processing, one-class classification, SQL injection attacks, numerical modelling, streaming data classification, creation and optimisationof circuits, multi-class classification, scheduling in manufacturing andwireless networks.