This bookconstitutes the proceedings of the 19th International Conference on FundamentalApproaches to Software Engineering, FASE 2016, which took place in Eindhoven,The Netherlands, in April 2016, held as Part of the European Joint Conferenceson Theory and Practice of Software, ETAPS 2016.The 23 full papers presented in this volume were carefully reviewed and selectedfrom 90 submissions. They were organized in topical sections named: concurrentand distributed systems; model-driven development; analysis and bug triaging;probabilistic and stochastic systems; proof and theorem proving; andverification.