The Episcopal Church (TEC), also known as the Protestant Episcopal Church in the United States of America (PECUSA), is a member of the worldwide Anglican Communion, based in the United States. It is a mainline Protestant denomination and is divided into nine provinces. The current presiding bishop of the Episcopal Church is Sean W. Rowe.

In 2023, the Episcopal Church had 1,547,779 active baptized members. In 2011,^[update] it was the 14th largest denomination in the United States. In 2025, Pew Research estimated that 1 percent of the adult population in the United States, or 2.6 million people, self-identify as mainline Episcopalians. The church has seen a sharp decline in membership and Sunday attendance since the 1960s, particularly in the Northeast and Upper Midwest.

The church was organized after the American Revolution, when it separated from the Church of England, whose clergy are required to swear allegiance to the British monarch as Supreme Governor of the Church of England. The Episcopal Church describes itself as "Protestant, yet Catholic", and asserts it has apostolic succession, tracing the authority of its bishops back to the apostles via holy orders. The Book of Common Prayer, a collection of rites, blessings, liturgies, and prayers used throughout the Anglican Communion, is central to Episcopal worship. A broad spectrum of theological views is represented within the Episcopal Church, including evangelical, Anglo-Catholic, and broad church views.

Historically, members of the Episcopal Church have played leadership roles in many aspects of American life, including politics, business, science, the arts, and education. About three-quarters of the signers of the Declaration of Independence were affiliated with the Episcopal Church, and over a quarter of all Presidents of the United States have been Episcopalians. Historically, Episcopalians were overrepresented among American scientific elite and Nobel Prize winners. Numbers of the most wealthy and affluent American families, such as Boston Brahmin, Old Philadelphians, Tidewater, and Lowcountry gentry or old money, are Episcopalians. In the late 19th and early 20th centuries, many Episcopalians were active in the Social Gospel movement.

Since the 1960s and 1970s, the church has pursued a more liberal Christian course; there remains a wide spectrum of liberals and conservatives within the church. In 2015, the church's 78th triennial General Convention passed resolutions allowing the blessing of same-sex marriages and approved two official liturgies to bless such unions. It has opposed the death penalty and supported the civil rights movement. The church calls for the full legal equality of LGBT people. In view of this trend, the conventions of four dioceses of the Episcopal Church voted in 2007 and 2008 to leave that church and to join the Anglican Church of the Southern Cone of America. Twelve other jurisdictions, serving an estimated 100,000 persons at that time, formed the Anglican Church in North America (ACNA) in 2008. The ACNA and the Episcopal Church are not in full communion with one another.

The "Protestant Episcopal Church in the United States of America" (PECUSA) and "The Episcopal Church" (TEC) are both official names specified in the church's constitution. The latter is much more commonly used. In other languages, an equivalent is used. For example, in Spanish, the church is called Iglesia Episcopal Protestante de los Estados Unidos de América or Iglesia Episcopal, and in French Église protestante épiscopale des États-Unis d'Amérique or Église épiscopale.

Until 1964, "The Protestant Episcopal Church in the United States of America" was the only official name in use. In the 19th century, high church members advocated changing the name, which they felt did not acknowledge the church's catholic heritage. They were opposed by the church's evangelical wing, which felt that the "Protestant Episcopal" label accurately reflected the Reformed character of Anglicanism. After 1877, alternative names were regularly proposed and rejected by the General Convention. One proposed alternative was "the American Catholic Church". Respondents to a 1961 poll in The Living Church favored "The American Episcopal Church". By the 1960s, opposition to dropping the word "Protestant" had largely subsided. In a 1964 General Convention compromise, priests and lay delegates suggested adding a preamble to the church's constitution, recognizing "The Episcopal Church" as a lawful alternate designation while still retaining the earlier name.

The 66th General Convention voted in 1979 to use the name "The Episcopal Church" in the Oath of Conformity of the Declaration for Ordination. The evolution of the name can be seen in the church's Book of Common Prayer. In the 1928 BCP, the title page read, "According to the use of The Protestant Episcopal Church in the United States of America", whereas on the title page of the 1979 BCP it states, "According to the use of The Episcopal Church".