Religion Clauses — Establishment & Free Exercise Under the First Amendment
The First Amendment contains two religion clauses: the Establishment Clause ("Congress shall make no law respecting an establishment of religion") and the Free Exercise Clause ("or prohibiting the free exercise thereof"). Together, they create a constitutional framework for the relationship between government and religion that is simultaneously protective and restrictive: the government may not establish or endorse religion, but it also may not prohibit or burden religious practice. The Establishment Clause prevents the government from setting up an official church, favoring one religion over another, or coercing participation in religious activity — though the Supreme Court has moved from strict separationism (Lemon v. Kurtzman's three-part test, 1971) toward a historical practices and understandings approach (Kennedy v. Bremerton School District, 2022). The Free Exercise Clause protects religious belief absolutely and religious conduct to a significant degree — though after Employment Division v. Smith (1990), neutral laws of general applicability that incidentally burden religious practice do not trigger strict scrutiny (Congress responded with the Religious Freedom Restoration Act to restore strict scrutiny by statute). The tension between the two clauses — the Establishment Clause says the government can't promote religion, the Free Exercise Clause says it can't burden religion — creates some of the most difficult constitutional questions: must the government exempt religious organizations from generally applicable laws? May the government fund religious schools? Can a government employee pray publicly? See Civil Rights Act for statutory religious discrimination protections and Federal Court System for where these claims are adjudicated.
Current Law (2026)
| Parameter | Value |
|---|---|
| Constitutional provisions | First Amendment — Establishment Clause + Free Exercise Clause |
| Establishment Clause test | Historical practices and understandings (Kennedy v. Bremerton, 2022 — replaced Lemon test) |
| Free Exercise standard | Neutral laws of general applicability: rational basis (Smith, 1990); laws targeting religion: strict scrutiny (Church of Lukumi Babalu Aye, 1993) |
| RFRA/RLUIPA | Statutory restoration of strict scrutiny for federal law (RFRA) and land use/prisons (RLUIPA) |
| School prayer | Government-led prayer prohibited; student-initiated voluntary prayer protected |
| Public funding | Government may include religious schools in generally available aid programs (Carson v. Makin, 2022) |
| Religious displays | Evaluated under historical-practices approach (crosses, Ten Commandments — case-specific) |
| Ministerial exception | Religious organizations may hire/fire ministers without employment discrimination laws applying (Hosanna-Tabor, 2012) |
Legal Authority
- U.S. Constitution, Amend. I — "Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof"
- 42 U.S.C. § 2000bb — Religious Freedom Restoration Act (RFRA) — federal government may not substantially burden religious exercise without compelling interest and least restrictive means
- 42 U.S.C. § 2000cc — Religious Land Use and Institutionalized Persons Act (RLUIPA) — strict scrutiny for zoning/land use and prison religious exercise
How It Works
The Religion Clauses of the First Amendment — the Establishment Clause ("Congress shall make no law respecting an establishment of religion") and the Free Exercise Clause ("or prohibiting the free exercise thereof") — govern all government interactions with religion. For five decades, the Establishment Clause was interpreted through the Lemon v. Kurtzman (1971) three-part test (secular purpose, no primary effect of advancing religion, no excessive entanglement), but in Kennedy v. Bremerton School District (2022) the Supreme Court formally abandoned Lemon in favor of interpretation by reference to "historical practices and understandings" — what the Founding generation would have understood the Clause to permit. School-sponsored prayer remains prohibited (Engel v. Vitale, 1962; Abington v. Schempp, 1963), but Kennedy held that a football coach's personal post-game prayer at midfield was protected private speech, not government-sponsored religion. Public funding has expanded dramatically: Zelman v. Simmons-Harris (2002) upheld school vouchers usable at religious schools, Trinity Lutheran (2017) held that excluding religious organizations from generally available public benefits violates Free Exercise, and Carson v. Makin (2022) established that if a state funds private education, it may not exclude religious schools solely because they are religious — effectively requiring states to include them in school choice programs.
For Free Exercise, Employment Division v. Smith (1990) held that neutral, generally applicable laws that incidentally burden religion receive only rational basis review. But laws that target religious practice receive strict scrutiny (Church of Lukumi Babalu Aye v. Hialeah, 1993), and in Fulton v. City of Philadelphia (2021) the Court held that a law with a system of individualized exemptions is not "generally applicable" — triggering strict scrutiny when religious exemptions are denied. The ministerial exception — grounded in both Free Exercise and freedom of association — gives religious organizations an absolute right to hire, fire, and manage their ministers (broadly defined to include teachers at religious schools who perform religious functions) without being subject to employment discrimination laws, as established in Hosanna-Tabor Evangelical Lutheran Church v. EEOC (2012) and expanded in Our Lady of Guadalupe School v. Morrissey-Berru (2020).
How It Affects You
If you're a parent navigating public school religious expression or school choice: Your child has the right to pray privately, read religious texts, and express religious views at school on the same terms as other student expression — this is protected free exercise and free speech, not state-established religion. What's prohibited: school-sponsored prayer led by teachers or administrators, mandatory devotional activities, or religious instruction as part of the curriculum. Kennedy v. Bremerton (2022) held that even a visible, public post-game prayer by a coach at midfield was protected private expression — though the ruling's scope for faculty religious expression in schools is still being worked out by lower courts.
Your child may start a voluntary student religious club under the Equal Access Act (20 U.S.C. § 4071) — if your school allows any non-curriculum student groups to meet, it must allow religious groups on the same terms. The school cannot sponsor, lead, or co-opt the club, but it must provide equal access to facilities and announcements. Graduation prayers: student-delivered graduation prayers are generally constitutional when student-initiated and voluntary; school-arranged or faculty-delivered graduation prayers remain prohibited.
For school choice: Carson v. Makin (2022) and Espinoza v. Montana (2020) established that if your state offers education funding through vouchers, tax credit scholarships, or education savings accounts, it cannot exclude religious schools solely because they are religious. Many states have had to expand their school choice programs to include accredited religious schools following these decisions. To find school choice programs in your state: EdChoice.org maintains a state-by-state school choice program tracker including which states include religious schools.
If you run a religious organization facing zoning, licensing, or employment law pressures: Three distinct legal tools protect you, and knowing which applies to your situation is critical:
RLUIPA (Religious Land Use and Institutionalized Persons Act, 42 U.S.C. § 2000cc): If your local government is imposing zoning restrictions on your church, synagogue, mosque, or religious school — including denying building permits, imposing parking requirements stricter than comparable uses, or applying land-use regulations that treat you worse than comparable secular assemblies — RLUIPA requires those restrictions to survive strict scrutiny. The government must show a compelling interest served by the least restrictive means. RLUIPA also prohibits "substantial burden" on religious assembly even through neutral zoning rules if a less restrictive alternative exists. If you're facing a zoning denial or conditional approval that burdens your religious assembly, contact the Becket Fund for Religious Liberty (becketlaw.org) or the Alliance Defending Freedom (adfmedia.org) — both provide free legal representation in RLUIPA cases.
RFRA (Religious Freedom Restoration Act, 42 U.S.C. § 2000bb): Applies to federal laws and actions. If a federal regulation substantially burdens your religious exercise, the government must demonstrate a compelling interest and use the least restrictive means. RFRA has been used to challenge vaccine mandates on federal contractors, healthcare coverage requirements under the ACA, and other federal regulatory burdens on religious organizations. State RFRA statutes (~22 states) provide analogous protection against state-law burdens.
Ministerial exception: Religious organizations may hire, fire, and manage their ministers — defined broadly to include teachers and staff who are "essential to the mission" of the religious organization — without being subject to Title VII, the ADA, ADEA, or other employment discrimination statutes. Hosanna-Tabor (2012) and Our Lady of Guadalupe (2020) established that the exception extends to teachers at religious schools who teach religion and perform religious functions even if not formally ordained. The key question is whether the employee's role is "important" to the religious organization's religious character — not whether they hold the title "minister." Document the religious duties of employees you might need to classify as ministerial; courts look at the totality of the role.
If you're a public official (teacher, administrator, government employee) managing religious expression in your workplace or program: Kennedy v. Bremerton has expanded but not eliminated the line between permissible personal religious expression and prohibited government establishment. The core rule remains: you cannot use your official authority to sponsor, lead, or coerce participation in religious activity. What you can do: engage in personal, private religious expression in your private capacity even if you're on government property; wear religious attire or symbols in your personal capacity; make personal religious references that are clearly identifiable as personal speech, not official pronouncement. What you cannot do: lead students or employees in prayer, require attendance at religious events, use government resources to promote religious observance, or make hiring/promotion decisions based on religion.
For legislative bodies: Marsh v. Chambers (1983) and Town of Greece v. Galloway (2014) upheld legislative prayer before government meetings, finding that this reflects a historical practice dating to the founding. The prayer must not proselytize or denigrate other faiths; the invitation to lead prayer must be open to diverse faith traditions, not systematically limited to one denomination. For government displays: crosses, Ten Commandments, and other religious symbols on public property are evaluated under the historical practices and understandings approach from Kennedy — context, history, and coercive effect matter. The display of a solitary religious symbol on government property without historical context is more vulnerable than a display that has long-standing community significance.
If you're an employer dealing with religious accommodation requests: Groff v. DeJoy (2023) significantly expanded employees' Title VII accommodation rights. Under the old Trans World Airlines v. Hardison (1977) standard, employers could deny religious accommodations if the cost was more than "de minimis." The Supreme Court in Groff replaced that with a "substantial in the overall context of the employer's business" standard — a meaningfully higher bar for denial. This means: scheduling accommodations for Sabbath observance, exemptions from uniform or dress code requirements, and exemptions from mandatory activities that conflict with religious practice are now much harder to deny without documented evidence that the accommodation imposes a substantial burden across your business. If you deny a religious accommodation, document exactly how the accommodation creates genuine operational hardship — vague assertions won't survive EEOC scrutiny under the new standard.
On the intersection with anti-discrimination law: 303 Creative v. Elenis (2023) held that a web designer could not be compelled under a state anti-discrimination law to create websites celebrating same-sex marriages contrary to her religious convictions — because the government cannot compel expressive content. The ruling is explicitly limited to expressive/creative businesses (not all businesses); a restaurant owner cannot invoke 303 Creative to refuse to serve customers based on sexual orientation. Where the line is between "expressive" businesses (covered) and "non-expressive" businesses (not covered) is actively litigated. If you're operating a business that creates personalized expressive content (photography, web design, custom writing, graphic art) and have religious objections to creating content for certain events or messages, consult with an attorney before refusing service — the law is still unsettled in your specific context.
State Variations
The Religion Clauses apply to all levels of government:
- State constitutions have their own religion clauses — many include "Blaine Amendments" that historically prohibited public funding of "sectarian" institutions (these are now substantially limited by Espinoza and Carson)
- State RFRA statutes in ~22 states provide additional religious liberty protections
- State courts may interpret state religion clauses differently from the federal standard
- Local zoning and land-use decisions affecting religious institutions are governed by RLUIPA's strict scrutiny standard
Implementing Regulations
The Religion Clauses (Establishment and Free Exercise) are constitutional provisions — no CFR implementing regulations. Congress has enacted statutes implementing free exercise protections: RFRA (42 U.S.C. § 2000bb), RLUIPA (42 U.S.C. § 2000cc). Key precedent includes Lemon v. Kurtzman (1971, Establishment), Employment Division v. Smith (1990, Free Exercise), Kennedy v. Bremerton (2022, replacing Lemon with historical practices test), and 303 Creative v. Elenis (2023).
Pending Legislation
Religious liberty issues arise across multiple areas — see Religious Freedom Restoration Act and Civil Rights. The Ninth Amendment provides additional textual support for the fundamental nature of religious liberty as a retained right.
Recent Developments
The Supreme Court's shift from Lemon to historical-practices analysis is reshaping Establishment Clause law — lower courts are working out what the new framework means in practice for religious displays, legislative prayers, school policies, and public funding. The Free Exercise Clause has been significantly strengthened through Fulton, Tandon v. Newsom (2021, striking COVID restrictions on religious worship), and the expansion of the ministerial exception. The tension between religious liberty and LGBTQ+ anti-discrimination protections — highlighted in Masterpiece Cakeshop (2018) and 303 Creative (2023) — remains one of the most contested areas in constitutional law.
- Oklahoma religious charter school (St. Isidore case, 2025): The Supreme Court heard argument in Oklahoma Statewide Charter School Board v. Drummond — whether a state must fund a Catholic virtual charter school or may deny it funding because charter schools are classified as state public schools. The Oklahoma Supreme Court had ruled the Catholic charter school unconstitutional; the Supreme Court's ruling would determine how far the government must go in including religious schools in public school choice programs. A ruling for St. Isidore would dramatically expand religious school access to public funding under the Free Exercise framework of Espinoza (2020) and Carson (2022).
- Religious exemptions and employment law (2024): Groff v. DeJoy (2023) significantly strengthened Title VII religious accommodations (enforced by the EEOC) — holding that employers must grant religious accommodation requests unless the burden is "substantial in the overall context of an employer's business," rejecting the prior "de minimis" hardship standard. In practice, this means more employees can obtain religious exemptions from workplace policies — including COVID vaccine mandates, dress codes, and work schedules. The 2025 EEOC under Trump has shifted its religious accommodation guidance to align with Groff's expansive reading.
- Trump and religious freedom executive orders (2025): The Trump administration issued executive orders directing agencies to prioritize religious freedom in enforcement decisions — including protecting religious organizations from discrimination based on their religious beliefs about marriage, gender, and sexuality. These orders affect federal contractors, grant recipients, and federal employees. Courts have evaluated whether these orders conflict with existing anti-discrimination requirements; some have been enjoined as applied to specific contexts.
- RFRA and transgender healthcare mandates: Religious organizations have used the Religious Freedom Restoration Act (RFRA) to challenge federal requirements to cover gender-affirming care in employee health plans. Religious Sisters of Mercy v. Becerra and related cases argue that the ACA's non-discrimination requirements — as interpreted to require coverage of gender-affirming procedures — violate RFRA for religious employers who object based on their religious beliefs. Under the Trump administration, HHS has revised the relevant ACA guidance, reducing but not eliminating the litigation pressure.