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. Xavier Institute of Social Service was established in 1955 as a center for social service at St. Xavier’s College, Ranchi. It was named after the Francis Xavier.