This book constitutes the refereed proceedings of the 20th International Conference on Innovations for Community Services, I4CS 2020, held in Bhubaneswar, India, in January, 2020.The 16 revised full papers presented in this volume were carefully reviewed and selected from 46 submissions. The papers focus on all aspects of: communities and social networks; information and system security; cloud and network security; communication and networks; and data analytics and e-governance.