Xavier Institute of Social Service (XISS) (Hindi: जेवियर समाज सेवा संस्थान (एक्सआईएसएस)) is a Jesuit-run business school in Ranchi, India.

It was established as an extension department of St. Xavier's College, Ranchi, in 1955 by Michael A. Windey with the objective of training young men and women in Rural Development, Personnel Management and Industrial Relations.

[4] In 1963, Micheal Van Den Bogaert was appointed as the director of XISS and rendered his service to the institute for 23 years.

], XISS offers the following diploma and certificate programmes: The institute has collaborated with UNICEF to launch a Knowledge Management Resource Centre (KMRC) with a view to build a knowledge base for women and children-related issues in Jharkhand.

[citation needed] The institute is known in the corporate world for its Post Graduate program in Rural Management and Human Resource Management with leading multinationals and Indian companies coming for campus interviews.