State Action Doctrine — When the Constitution Applies to Private Conduct

The state action doctrine is the threshold requirement for most constitutional claims: the Constitution — with the sole exception of the Thirteenth Amendment — protects individuals only against government action, not private conduct. The Fourteenth Amendment provides that "No State shall . . . deny to any person . . . the equal protection of the laws" — and in the Civil Rights Cases (1883), the Supreme Court held that this language limits the Amendment's reach to state action: government conduct, laws, policies, and official decisions. Private discrimination — a restaurant refusing to serve you, an employer firing you, a landlord rejecting your application — does not violate the Fourteenth Amendment (though it may violate federal statutes like the Civil Rights Act of 1964 or the Fair Housing Act, which Congress enacted under its Commerce Clause and Thirteenth Amendment powers). The state action doctrine determines the boundary between constitutional law (which constrains the government) and statutory law (which Congress may extend to private actors). But the line between "state" and "private" action is not always clear — and the Supreme Court has developed several tests for when ostensibly private conduct is sufficiently connected to the government to constitute state action: the public function doctrine (private parties performing functions traditionally reserved to the state), the entanglement/nexus test (government so intertwined with private conduct that it becomes attributable to the state), the compulsion test (government coercing or commanding private discrimination), and the joint action test (private parties acting in concert with government officials). These exceptions are narrow and difficult to satisfy — the Court has consistently resisted expanding the state action concept to reach purely private conduct. See Section 1983 for the primary vehicle for suing state actors, Civil Rights Act for the statutory framework reaching private discrimination, and Thirteenth Amendment for the sole constitutional provision that does reach private conduct.

Current Law (2026)

Parameter	Value
Core principle	Constitutional protections (except 13th Amendment) apply only to government action, not private conduct
Constitutional basis	Fourteenth Amendment ("No State shall . . ."); Fifth Amendment (federal government)
State action exceptions	Public function, entanglement/nexus, compulsion, joint action
Public function	Private entity performing a function "traditionally exclusively reserved to the State" — Marsh v. Alabama (1946), Manhattan Community Access v. Halleck (2019)
Entanglement	Government so intertwined with private conduct that it's attributable to the state — Burton v. Wilmington Parking Authority (1961)
Key cases	Civil Rights Cases (1883), Shelley v. Kraemer (1948), Marsh v. Alabama (1946), Brentwood Academy v. TSSAA (2001), Manhattan Community Access v. Halleck (2019)
Thirteenth Amendment exception	13th Amendment applies to private conduct — the only constitutional provision that does

Legal Authority

The state action doctrine is judge-made constitutional doctrine:

Civil Rights Cases (1883) — The Fourteenth Amendment prohibits only state action; Congress cannot use it to reach purely private discrimination
Shelley v. Kraemer (1948) — Judicial enforcement of racially restrictive covenants constitutes state action (courts are part of the state)
Marsh v. Alabama (1946) — A company town performing the public function of governing a municipality is a state actor
Burton v. Wilmington Parking Authority (1961) — A private restaurant in a government-owned building, with government involvement in its operations, was sufficiently entangled with the state
Brentwood Academy v. Tennessee Secondary School Athletic Ass'n (2001) — A nominally private athletic association was a state actor because it was "entwined with government" through public school membership and oversight
Manhattan Community Access Corp. v. Halleck (2019) — A private nonprofit operating public access cable channels is NOT a state actor — the public function exception is limited to functions "traditionally exclusively reserved to the State"

How It Works

The Constitution is a charter of negative liberties — it tells the government what it cannot do, not what private citizens must do. If your employer fires you for political speech, that's not a First Amendment violation. If a private university expels you without a hearing, that's not a Due Process violation. If a private club refuses to admit you because of your race, that's not an Equal Protection violation (though it may violate the Civil Rights Act of 1964). The state action doctrine preserves this public/private distinction, and the Supreme Court has been reluctant to erode it. Two narrow exceptions exist. The public function doctrine: private conduct constitutes state action when the entity performs a function "traditionally exclusively reserved to the State." Running a company town (Marsh v. Alabama, 1946) qualifies; running elections (the white primary cases) qualifies; but most activities private parties perform — education, healthcare, utilities, public access television — do not, even if the government also performs them. Manhattan Community Access v. Halleck (2019) confirmed the narrowness. The entanglement/nexus test: state action exists when the government is so intertwined with private conduct that the action is fairly attributable to the state — Burton v. Wilmington Parking Authority (1961) found state action where a private restaurant operated in a government-owned building with mutual financial dependency; Brentwood Academy v. TSSAA (2001) found it where 84% of a private athletic association's members were public schools and government officials participated in its governance. But mere government regulation, licensing, funding, or oversight of a private entity does not create state action.

Shelley v. Kraemer (1948) established one unique application: when a state court enforces a racially restrictive covenant, that judicial enforcement is state action — courts are arms of the state. Courts have limited Shelley to its specific context and have not extended this principle broadly. Because the Constitution generally doesn't reach private conduct, statutes do the heavy lifting for private discrimination: Title VII (employment), Title II (public accommodations), the Fair Housing Act, the ADA, and 42 U.S.C. §§ 1981–1982 (racial discrimination in contracts and property, enacted under the Thirteenth Amendment, which uniquely does reach private conduct). These statutes exist precisely because the state action doctrine limits the Constitution's reach against purely private actors.

How It Affects You

If you're facing discrimination by a private company, employer, landlord, or individual: The most important thing to understand: the Constitution doesn't directly protect you against private actors (with the sole exception of the Thirteenth Amendment). A restaurant that refuses to serve you, a landlord who won't rent to you, or an employer who fires you because of your race — none of these are Fourteenth Amendment violations because they're private actors, not the government. Your legal protection comes entirely from statutes. The right statute depends on the context:

Employment discrimination (race, color, religion, sex, national origin): Title VII of the Civil Rights Act of 1964 — covers employers with 15+ employees; file with the EEOC within 180 days of the discriminatory act (300 days if your state has an anti-discrimination agency). The EEOC issues a Right to Sue letter; you then have 90 days to file in federal court. Age discrimination: ADEA (29 U.S.C. §§ 621–634, 40+ employees). Disability discrimination: ADA Title I.
Public accommodations (restaurants, hotels, retail, theaters): Civil Rights Act of 1964, Title II (42 U.S.C. § 2000a) — prohibits discrimination by "places of public accommodation" based on race, color, religion, national origin. Disability accommodations: ADA Title III (businesses open to the public).
Housing: Fair Housing Act (42 U.S.C. §§ 3601–3631) — covers sales and rentals, prohibits discrimination based on race, color, national origin, religion, sex, familial status, or disability. File with HUD within 1 year or sue in federal court within 2 years.
Racial discrimination in contracts and property (no size threshold, no numerosity requirement): 42 U.S.C. § 1981 (contracts — the right to make and enforce contracts free from racial discrimination) and 42 U.S.C. § 1982 (property) — enacted under Congress's Thirteenth Amendment power, which reaches private conduct. These statutes allow direct suits against private parties without going through an agency first.
State civil rights laws: Most states have anti-discrimination laws that are often broader than federal law — covering smaller employers, protecting additional classes (sexual orientation, gender identity in states that predated Bostock), and having longer statutes of limitations. California FEHA, New York Human Rights Law, Illinois Human Rights Act, and others may provide stronger remedies than federal law.

For § 1983 claims against government actors: If your discrimination involves a government actor — police, public school, city agency, state employee — you may have both constitutional claims and § 1983 (42 U.S.C. § 1983) civil rights claims. Section 1983 allows you to sue state and local officials who deprive you of constitutional rights "under color of law." The state action doctrine is the threshold: only government conduct or conduct sufficiently connected to government qualifies.

If you're a private business, university, hospital, or social media platform: Understanding the state action doctrine helps you understand your constitutional exposure — which is generally zero unless you fall into one of the narrow exceptions.

What you're NOT subject to (absent exceptional circumstances):

First Amendment claims from customers or users over speech restrictions (your content moderation policies are not state action)
Due Process claims from students you expel or employees you discipline (private school expulsion is not state action)
Equal Protection claims from applicants you reject (private employers and institutions are not state actors)

The narrow exceptions that might apply:

Public function (Marsh v. Alabama, 1946): If your company owns an entire town and performs government functions — police, utilities, streets, postal services — you may be a state actor for those functions. Almost no modern entity qualifies; this is largely historical.
Entanglement (Burton v. Wilmington Parking Authority, 1961): If government is so financially intertwined with your private operation that your conduct is fairly attributable to the state. Requires more than licensing, funding, or regulation — courts have consistently held (Rendell-Baker v. Kohn, 1982; Blum v. Yaretsky, 1982) that government funding alone doesn't create state action. Mutual financial dependency (the government needs the private entity's revenue to pay its own obligations) can suffice.
Social media: After Manhattan Community Access v. Halleck (2019), operating a social media platform is not a traditional, exclusive state function — users cannot bring First Amendment claims against platform content moderation. But platforms have their own First Amendment rights; state laws compelling them to carry certain content face their own constitutional challenges (Moody v. NetChoice, 2024).

What statutory obligations DO apply: Federal and state statutes — not the Constitution — govern what you must do. Title VII, ADA, FHA, state civil rights laws, and other statutes impose nondiscrimination requirements on private actors, enforced by federal agencies and through private lawsuits.

If you're a government contractor or recipient of federal financial assistance: Receiving federal money does NOT make you a state actor subject to constitutional claims — but it triggers statutory nondiscrimination requirements that have broad practical effect:

Title VI (42 U.S.C. § 2000d): no discrimination based on race, color, or national origin by recipients of federal financial assistance — enforced by funding agencies (OCR, EEOC, DOT civil rights offices)
Section 504 of the Rehabilitation Act (29 U.S.C. § 794): no discrimination based on disability by recipients of federal financial assistance — enforced by OCR and relevant funding agencies
Title IX (20 U.S.C. § 1681): no sex discrimination by educational institutions receiving federal funds — enforced by OCR
Executive Order 11246: federal contractors with 50+ employees and $50,000+ contracts must maintain affirmative action plans and not discriminate in employment — enforced by OFCCP

If you're a civil rights attorney navigating the state action question: The state action analysis is a threshold issue that belongs in your case evaluation before you draft a complaint.

Analytical checklist:

Is the defendant a government actor? Government agencies, officials, police, public schools, state universities → state action established. Proceed to the merits.
Is the defendant a private party? You need either a statute (Title VII, FHA, ADA, § 1981, § 1982, state civil rights law) or a state action exception.
Which exception to analyze? (a) Public function — is the defendant performing a function "traditionally and exclusively" reserved to the state? Almost always no. (b) Entanglement — is government so interwoven with the private conduct that it's fairly attributable to the state? Requires financial mutual dependency, not just regulation. (c) Compulsion — did the government direct or command the private discrimination? (d) Joint action — did the private party conspire or act in concert with state officials? (Dennis v. Sparks, 1980 — private party conspiring with judge to corrupt proceeding is a state actor.)
For § 1983 specifically: The statutory standard is action "under color of" state law — essentially the same as state action. Private parties can be § 1983 defendants in two narrow circumstances: (a) conspiracy with state actors; (b) when a statute or government delegation makes them state actors.
For purely private racial discrimination in contracts: 42 U.S.C. § 1981 reaches private conduct under Congress's Thirteenth Amendment power — no state action required. This is your vehicle when the defendant is private and the conduct involves racial discrimination in contracting, hiring, or property.

State Variations

The state action doctrine applies to all states through the Fourteenth Amendment:

State constitutions may provide broader protections — some state courts have found state action in contexts where federal courts would not
State anti-discrimination statutes often cover a broader range of private conduct than federal law
Some states' constitutions have been interpreted to reach certain private conduct (California's Pruneyard Shopping Center v. Robins — state free speech rights in private shopping centers)
The practical gap left by the state action doctrine varies by state depending on the breadth of state civil rights statutes

Implementing Regulations

The state action doctrine is a judicial doctrine determining when private conduct constitutes government action subject to constitutional constraints — no implementing regulations exist. Key precedent: Shelley v. Kraemer (1948, judicial enforcement of racially restrictive covenants is state action), Burton v. Wilmington Parking Authority (1961, symbiotic relationship between private actor and government satisfies entanglement test), Brentwood Academy v. Tennessee Secondary School Athletic Association (2001, entwinement test — private athletic association pervasively intertwined with public schools is a state actor), and Manhattan Community Access Corp. v. Halleck (2019, restrictive approach to public function doctrine — the exception is limited to functions "traditionally exclusively reserved to the State").

Pending Legislation

No standalone legislation — see Civil Rights Act and Section 1983.

Recent Developments

Manhattan Community Access Corp. v. Halleck (2019) was the most significant recent state action decision — the 5-4 ruling narrowed the public function doctrine, holding that operating public access cable channels is not a traditional, exclusive state function. The decision has implications for social media platforms — if operating cable channels isn't a public function, operating social media platforms almost certainly isn't either, limiting constitutional claims against platform content moderation. The state action doctrine remains central to debates over whether and how the Constitution constrains private technology companies, social media platforms, and other powerful private actors. Congressional statutes (not constitutional claims) remain the primary mechanism for regulating private conduct.