Ecclesiastical titles are the formal styles of address used for members of the clergy.

Catholic Church

Latin Church clergy

United Kingdom and some other English-speaking countries

The major difference between U.S. practice and that in several other English-speaking countries is the form of address for archbishops and bishops. In Britain and countries whose Roman Catholic usage it directly influenced: In Ireland, and in other countries whose Roman Catholic usage it influenced, all bishops, not archbishops alone, are titled the Most Reverend (Most Rev.). Clergy are often referred to with the title Doctor (Dr.), or have D.D. (Doctor of Divinity) placed after their name, where justified by their possession of such degree.

Italy

Similar to, and the source of, most of the U.S. English titles, with some variation:

The Philippines

In the predominantly Catholic Philippines, ecclesiastical addresses are adapted from American custom but with modifications. The titles listed below are only used in the most formal occasions by media or official correspondence, save for the simpler forms of address. Post-nominals that indicate academic degree or membership in a religious order are usually included.

Eastern Catholic clergy

Although the styles and titles of Eastern Catholic clergy varies from language to language, in the Greek and Arabic-speaking world the following would be acceptable, but is by no means a full list of appropriate titles. It is notable that surnames are never used except in extra-ecclesial matters or to specify a particular person where many share one Christian name or ordination name. Where not noted, Western titles may be supposed. The following are common in Greek Melkite Catholic usage and in Greek Orthodox usage in the United States.

Eastern Orthodox Church

Usage varies somewhat throughout the Eastern Orthodox Communion, and not every church uses every clerical rank. Surnames are typically not used for archpastors (rank of bishop or above) or monastics.

Anglican Church

Anglican and Episcopal

In the Anglican and Episcopal Church, added titles are referred to as "preferments" and are ordered by bishops. Such appointments that place a preferment title in front of "Reverend" are normally a permanent preferment, while those after "Reverend" are not. For example, a bishop or an archdeacon retain their titles even after leaving their ministry posts. Generally, the preferment of "canon", which can be given to either ordained or laity, is not a permanent preferment. However, Bishops have been known to prefer a lifetime honorific of "Canon" to lay canons. For religious orders, all preferments, except that of a mitred abbot, are temporary and associated with the role, not the individual.

Other Protestantism

Lutheranism

Methodism