Collective narcissism (or group narcissism) is a type of narcissism where an individual has an inflated self-love of his or her own ingroup, where an “ingroup” is a group in which an individual is personally involved. While the classic definition of narcissism focuses on the individual, collective narcissism asserts that one can have a similar excessively high opinion of a group, and that a group can function as a narcissistic entity. Collective narcissism is related to ethnocentrism; however, ethnocentrism primarily focuses on self-centeredness at an ethnic or cultural level, while collective narcissism is extended to any type of ingroup beyond just cultures and ethnicities. Some theorists believe group-level narcissism to be an extension of individual narcissism, though others believe the two to be quite independent.

Freud in his 1922 study Group Psychology and the Analysis of the Ego, noted how 'every little canton looks down upon the others with contempt', as an instance of what would later to be termed 'Freud's theory of collective narcissism'. Thereafter Wilhelm Reich and Isaiah Berlin explored what the latter called 'the rise of modern national narcissism: the self-adoration of peoples'; while ”Group narcissism” is described in a 1973 book entitled The Anatomy of Human Destructiveness by psychologist Erich Fromm.