The Unamended Christadelphians are a "fellowship" within the broader Christadelphian movement worldwide, found only in the United States and Canada. They are, like all Christadelphians, millennialist and non-Trinitarian. The term Unamended Christadelphians is not the formal name of this community but is used informally to identify the grouping since a statement of faith traditionally used by many in this community is the "Unamended Statement of Faith". Similarly, most of the much larger grouping of Amended Christadelphians traditionally use a statement of faith that has been amended and therefore, in North America is known by the prefix "Amended". Nevertheless, Christadelphians worldwide and both Amended and Unamended Christadelphians in North America share fundamentally the same doctrines, with a few exceptions.

The name Christadelphian derives from the Koine Greek meaning “Brethren of Christ”. Like all Christadelphians, The Unamended Christadelphians’ have neither formal, ordained, or paid clergy.