Atheism in the United States

American atheists
Total population
	56,000,000 (17%); (answered "No" to the question "Do you believe in God?"); (2017); 9,571,112 (3.1%); (self described atheists); (2014)
Religions
	Irreligion:; (including antitheism, agnostic atheism, apatheism, casualism, counter-apologeticism, debaptism evangelical atheism, freethought/freethinker, ignosticism, implicit and explicit atheism, Marxist–Leninist atheism, negative and positive atheism, nonbeliever, nontheism, post-theism, rationalism, new/scientific atheism, physicalism, metaphysical naturalism, logicalism, secular humanism, skepticism, etc.); Secular religions:; Buddhism; (including secular Buddhism, etc.); Christian atheism; (including Cultural Christian (Cultural Catholic, Cultural Mormon, Nontheist Quakers, etc.), Lapsed Catholic, Recovering Catholic etc.); Ethical movement; Hinduism; (including Adevism, Charvaka, Hindu atheist, etc.); Jainism; Jewish atheism; (including Cultural Judaism, etc.); Modern Paganism; Muslim atheism; (including Cultural Muslim, etc.); New religious movements; (including Creativity, Raëlism, etc.); Parody religions; (including Church of the Flying Spaghetti Monster/Pastafarianism, Invisible Pink Unicorn, Jediism, etc.); Satanism; Unitarian Universalism;

A 2023 poll by the Pew Research Center found that 4% of Americans in the United States self-identified as atheists. This is an increase from 3.1% of Americans in 2014. However, in 2014, 9% of Americans agreed with the statement "Do not believe in God" while 2% agreed with the statement "Do not know if they believe in God". According to a poll by non-profit PRRI in 2023, 4% of Americans were atheist and 5% were agnostic. Polling by Gallup in 2022 showed that 17% of respondents replied "No" when asked "Do you believe in God?" in a binary fashion, but when worded differently in 2023, Gallup found that 12% of respondents replied they "Do not believe in" God and 14% replied they were "Not sure about" the existence of God. According to Gallup, there are variations in their polling results because they ask about God in three different wordings, each with a different result.

According to the 2014 General Sociological Survey, the number of atheists and agnostics in the U.S. grew over the previous 23 years. In 1991, only 2% identified as atheist, and 4% identified as agnostic; while in 2014, 3.1% identified as atheists, and 5% identified as agnostics.

According to the 2008 ARIS, only 2% the US population was atheist, while 10% were agnostics.

One 2018 research paper using indirect methods estimated that 26% of Americans are atheists, which is much higher than the 3%-11% rates that are consistently found in surveys. However, methodological problems have been identified with this particular study; in particular, it has been posted that many people might not have a binary outlook to the question of the existence of God.

Accurate demographics of atheism are difficult to obtain since conceptions of atheism and self-identification are context dependent by culture. In 2009, Pew stated that only 5% of the US population did not have a belief in a god and out of that small group only 24% self-identified as "atheist", while 15% self-identified as "agnostic" and 35% self-identified as "nothing in particular". In 2023, Pew stated that 23% of atheists believe in a higher power, but not a god.

Total population
56,000,000 (17%) (answered "No" to the question "Do you believe in God?") (2017) 9,571,112 (3.1%) (self described atheists) (2014)
Religions
Irreligion: (including antitheism, agnostic atheism, apatheism, casualism, counter-apologeticism, debaptism evangelical atheism, freethought/freethinker, ignosticism, implicit and explicit atheism, Marxist–Leninist atheism, negative and positive atheism, nonbeliever, nontheism, post-theism, rationalism, new/scientific atheism, physicalism, metaphysical naturalism, logicalism, secular humanism, skepticism, etc.) Secular religions: Buddhism (including secular Buddhism, etc.) Christian atheism (including Cultural Christian (Cultural Catholic, Cultural Mormon, Nontheist Quakers, etc.), Lapsed Catholic, Recovering Catholic etc.) Ethical movement Hinduism (including Adevism, Charvaka, Hindu atheist, etc.) Jainism Jewish atheism (including Cultural Judaism, etc.) Modern Paganism Muslim atheism (including Cultural Muslim, etc.) New religious movements (including Creativity, Raëlism, etc.) Parody religions (including Church of the Flying Spaghetti Monster/Pastafarianism, Invisible Pink Unicorn, Jediism, etc.) Satanism Unitarian Universalism