List of Unitarians, Universalists, and Unitarian Universalists

A number of notable people have considered themselves Unitarians, Universalists, and following the merger of these denominations in the United States and Canada in 1961, Unitarian Universalists. Additionally, there are persons who, because of their writings or reputation, are considered to have held Unitarian or Universalist beliefs. Individuals who held unitarian (nontrinitarian) beliefs but were not affiliated with Unitarian organizations are often referred to as "small 'u'" unitarians. The same principle can be applied to those who believed in universal salvation but were not members of Universalist organizations. This article, therefore, makes the distinction between capitalized "Unitarians" and "Universalists" and lowercase "unitarians" and "universalists".

The Unitarians and Universalists are groups that existed long before the creation of Unitarian Universalism.

Early Unitarians did not hold Universalist beliefs, and early Universalists did not hold Unitarian beliefs. But beginning in the nineteenth century the theologies of the two groups started becoming more similar.

Additionally, their eventual merger as the Unitarian Universalist Association (UUA) did not eliminate divergent Unitarian and Universalist congregations, especially outside the US. Even within the US, some congregations still keep only one of the two names, "Unitarian" or "Universalist". However, with only a few exceptions, all belong to the UUA—even those that maintain dual affiliation (e.g., Unitarian and Quaker). Transcendentalism was a movement that diverged from contemporary American Unitarianism but has been embraced by later Unitarians and Unitarian Universalists.

In Northern Ireland, Unitarian churches are officially called "Non-Subscribing Presbyterian", but are informally known as "Unitarian" and are affiliated with the Unitarian churches of the rest of the world.

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