Title: History of religion in the United States
Content:  Jewish and Eastern Orthodox immigrants to the United States. While the Catholic Church is technically the largest single religious denomination in the United States, Protestantism in general (i.e. all of the Protestant denominations combined) remains the predominant and largest form of religion and the dominant form of Christianity in the United States. As Western Europe secularized in the late 20th century, the United States largely resisted the trend, so that, by the 21st century, the US was one of the most strongly Christian of all major Western nations. Religiously-based moral positions on issues such as abortion and homosexuality played a hotly debated role in American politics.
Title: Religion in the United States
Content:  Religion in the United States is diverse, with Christianity and specifically Protestantism being the majority religion, although declining at rapid pace. Various religious faiths have flourished within the United States. Just over 40% of Americans report that religion plays a very important role in their lives, a proportion unique among developed countries. Freedom of religion in the United States is guaranteed in the First Amendment to the United States Constitution. Historically, the United States has always been marked by religious pluralism and diversity, beginning with various native beliefs of the pre-colonial time, though Protestantism has long been the predominant and majority religion. In colonial times, Anglicans, Quakers, and other mainline Protestants arrived from Northwestern Europe. Various dissenting 
Title: Society of the United States
Content:   Historically, the United States' religious tradition has been dominated by Protestant Christianity. As of 2016, 74% of Americans identify as Christian with 49% identifying as Protestant. Catholicism (23%) is the largest Christian denomination, as Protestants belong to a variety of denominations. Also practiced in the United States are many other religions, such as Judaism, Hinduism, Islam, and Buddhism. Approximately 18% of Americans are unaffiliated; a majority of these are those not affiliated with any one religion, it also includes agnostics and atheists. The government is a secular institution, with what is often called the "separation of church and state" prevailing.
Title: Culture of the United States
Content:   Among developed countries, the U.S. is one of the most religious in terms of its demographics. According to a 2002 study by the Pew Global Attitudes Project, the U.S. was the only developed nation in the survey where a majority of citizens reported that religion played a "very important" role in their lives, an opinion similar to that found in Latin America. Today, governments at the national, state, and local levels are secular institutions, with what is often called the "separation of church and state". The most popular religion in the U.S. is Christianity, comprising the majority of the population (73.7% of adults in 2016). Although participation in organized religion has been diminishing, the 
Title: Religion in the United States
Content:  century, an unprecedented number of Catholic, Jewish, and Orthodox Christian immigrants arrived in the United States. Protestant Pentecostalism emerged in the early 20th century as a result of the Azusa Street Revival. Scientology emerged in the 1950s. Unitarian Universalism resulted from the merge of Unitarian and Universalist churches in the 20th century. Since the 1990s, the religious share of Christians has decreased, while Hinduism, Buddhism, Islam, Sikhism, and other religions have spread, mainly from immigration. When including "irreligion" or "unaffiliated" as a religious category for statistical purposes, Protestantism, historically and currently the dominant form of religion in the United States, ceased to be the religious category of the majority in the early 2010s, though this is 
Title: Religion in the United States
Content:  the result of an increase in Americans, including Americans of Protestant descent, professing no religious affiliation, rather than being primarily the result of an increase in non-Protestant religious affiliations; Protestantism remains the most common or the majority religion among those Americans who declare a religious affiliation. The United States has the world's largest Christian population and, more specifically, contains the largest Protestant population in the world. Christianity is the largest religion in the United States, with the various Protestant Churches having the most adherents. The United States has been called a Protestant nation by a variety of sources. In 2019, Christians represent 65% of the total adult population, 43% identifying as Protestants, 20% as Catholics, and 
Title: Christianity in the United States
Content:  categories of “irreligion” and “unaffiliated” are included as religious categories for statistical purposes, Protestantism is technically no longer the religious category of the majority; however, this is primarily the result of an increase in Americans, such as Americans of Protestant descent, professing no religious affiliation, rather than being the result of an increase in non-Protestant religious affiliations, and Protestantism remains by far the majority or dominant form of religion in the United States among American Christians and those Americans who declare a religion affiliation. Today, most Christian churches in the United States are either Mainline Protestant, Evangelical Protestant, or Catholic.
Title: United States
Content:  who identified with a specific religious group. Protestantism is the largest Christian religious grouping in the United States, accounting for almost half of all Americans. Baptists collectively form the largest branch of Protestantism at 15.4%, and the Southern Baptist Convention is the largest individual Protestant denomination at 5.3% of the U.S. population. Apart from Baptists, other Protestant categories include nondenominational Protestants, Methodists, Pentecostals, unspecified Protestants, Lutherans, Presbyterians, Congregationalists, Episcopalians/Anglicans, Quakers, Adventists, Holiness, Christian fundamentalists, Anabaptists, Pietists, and multiple others. The Bible Belt is an informal term for a region in the Southern United States in which socially conservative evangelical Protestantism is a significant part of the culture and Christian church attendance across the denominations is generally higher than the nation's average. By contrast, religion plays the least important role in New England and in the Western United States.
Title: Religion in the United States
Content:  as Mormons. People with no formal religious identity form 26% of the total population. When consolidating all Christian denominations into one religious grouping, Judaism is the second-largest religion in the U.S., practiced by 2% of the population, followed by Hinduism, Buddhism, and Islam, each with 1% of the population. Mississippi is the most religious state in the country, with 63% of its adult population described as very religious, saying that religion is important to them and attending religious services almost every week, while New Hampshire, with only 20% of its adult population described as very religious, is the least religious state. The most religious state or territory of the United States is American Samoa (99.3% religious).
Title: Religion and politics in the United States
Content:   Religion in the United States is remarkable in its high adherence level compared to other developed countries. The First Amendment to the country's Constitution prevents the government from having any authority in religion, and guarantees the free exercise of religion. A majority of Americans report that religion plays a "very important" role in their lives, a proportion unusual among developed nations, though similar to other nations in the Americas. Many faiths have flourished in the United States, including imports spanning the country's multicultural heritage as well as those founded within the country, and have led the United States to become the most religiously diverse country 

Question: what is the dominant religion in the us?
Answer: Christianity.