  This volume contains the proceedings of the 19th International Conference on
Quantum Physics and Logic (QPL 2022), which was held June 27-July 1, 2022 at
Wolfson College, University of Oxford, UK. QPL is an annual conference that
brings together academic and industry researchers working on mathematical
foundations of quantum computation, quantum physics, and related areas. The
main focus is on the use of algebraic and categorical structures, formal
languages, semantic methods, as well as other mathematical and computer
scientific techniques applicable to the study of physical systems, physical
processes, and their composition.
