A pilgrim (from the Latin peregrinus) is a traveler (literally one who has come from afar) who is on a journey to a holy place. Typically, this is a physical journey (often on foot) to some place of special significance to the adherent of a particular religious belief system. In the spiritual literature of Christianity, the concept of pilgrim and pilgrimage may refer to the experience of life in the world (considered as a period of exile) or to the inner path of the spiritual aspirant from a state of wretchedness to a state of beatitude

Pilgrims and the making of pilgrimages are common in many religions, including the faiths of ancient Egypt, Persia in the Mithraic period, India, China, and Japan. The Greek and Roman customs of consulting the gods at local oracles, such as those at Dodona or Delphi, both in Greece, are widely known. In Greece, pilgrimages could either be personal or state-sponsored.

In the early period of Hebrew history, pilgrims traveled to Shiloh, Dan, Bethel, and eventually Jerusalem (see also Three Pilgrimage Festivals, a practice followed by other Abrahamic religions). While many pilgrims travel toward a specific location, a physical destination is not always a necessity. One group of pilgrims in early Celtic Christianity were the Peregrinari Pro Christ, (Pilgrims for Christ), or "white martyrs", who left their homes to wander in the world. This sort of pilgrimage was an ascetic religious practice, as the pilgrim left the security of home and the clan for an unknown destination, trusting completely in Divine Providence. These travels often resulted in the founding of new abbeys and the spread of Christianity among the pagan population in Britain and in continental Europe.

Beginning in 1894, Christian ministers under the direction of Charles Taze Russell were appointed to travel to and work with local Bible Students congregations for a few days at a time; within a few years appointments were extended internationally, formally designated as "pilgrims", and scheduled for twice-yearly, week-long visits at each local congregation. International Bible Students Association (IBSA) pilgrims were excellent speakers, and their local talks were typically well-publicized and well-attended. Prominent Bible Students A. H. Macmillan and J. F. Rutherford were both appointed pilgrims before they joined the board of directors of the Watch Tower Bible and Tract Society of Pennsylvania; the IBSA later adopted the name Jehovah's Witnesses and renamed pilgrims as traveling overseers.