This book constitutes the proceedings of the 30th International Symposium on Distributed Computing, DISC 2016, held in Paris, France, in September 2016. The 32 full papers, 10 brief annoucements and 3 invited lectures presented in this volume were carefully reviewed and selected from 145 submissions. The focus of the conference is on following topics: theory, design, implementation, modeling, analysis, or application of distributed systems and networks.