In the United States, Section 230 is a section of the Communications Act of 1934 that was enacted as part of the Communications Decency Act of 1996, which is Title V of the Telecommunications Act of 1996, and generally provides immunity for online computer services with respect to third-party content generated by their users.

At its core, Section 230(c)(1) provides immunity from liability for providers and users of an "interactive computer service" who publish information provided by third-party users:

Section 230(c)(2) further provides "Good Samaritan" protection from civil liability for operators of interactive computer services in the voluntary good faith removal or moderation of third-party material the operator "considers to be obscene, lewd, lascivious, filthy, excessively violent, harassing, or otherwise objectionable, whether or not such material is constitutionally protected." Passed when Internet use was just starting to expand in both breadth of services and range of consumers in the United States, Section 230 has frequently been referred to as a key law which allowed the Internet to develop.

Section 230 was developed in response to a pair of lawsuits against online discussion platforms in the early 1990s that resulted in conflicting interpretations of whether the service providers should be treated as publishers (as held in Stratton Oakmont, Inc. v. Prodigy Services Co.), or merely as distributors of content created by their users (as held in Cubby, Inc. v. CompuServe Inc.). The section's authors, Representatives Christopher Cox and Ron Wyden, believed interactive computer services should be treated as distributors, not liable for the content they distributed, as a means to protect the then-growing Internet. Section 230 was enacted via the Communications Decency Act (CDA) of 1996. While most of the CDA was deemed unconstitutional in Reno v. American Civil Liberties Union (1997), Section 230 was determined to be severable from the rest of the legislation and remained in place. Since then, several legal challenges have validated the constitutionality of Section 230.

Section 230 protections do not apply to material that violates federal criminal law, intellectual property law, or human trafficking law, meaning providers are liable if they do not remove such content. In 2018, Section 230 was amended by the Allow States and Victims to Fight Online Sex Trafficking Act (FOSTA-SESTA) to require the removal of material violating federal and state sex trafficking laws.

Section 230 has come under increasing scrutiny since the 2010s, particularly related to hate speech, terrorism, and ideological biases from both left-wing and right-wing politics though for different reasons. Proponents of the law assert it is necessary to protect speech covered by the First Amendment, and repealing the law would not automatically confer liability to platforms for user-generated content consisting of hate speech or disinformation. Proponents also argue that calls to repeal or reform the law are generally based on a misinterpretation or misunderstanding of the law, as highlighted by the contradictory nature of left and right wing criticisms, and that abolishing Section 230 would greatly restrict freedom of speech and freedom of expression online.

Application and limits Section 230 has two primary parts both listed under §230(c) as the "Good Samaritan" portion of the law. Under section 230(c)(1), as identified above, an information service provider shall not be treated as a "publisher or speaker" of information from another provider. Section 230(c)(2) provides immunity from civil liabilities for information service providers that remove or restrict content from their services they deem "obscene, lewd, lascivious, filthy, excessively violent, harassing, or otherwise objectionable, whether or not such material is constitutionally protected", as long as they act "in good faith" in this action.

In analyzing the availability of the immunity offered by Section 230, courts generally apply a three-prong test. A defendant must satisfy each of the three prongs to gain the benefit of the immunity: The defendant must be a "provider or user" of an "interactive computer service". The cause of action asserted by the plaintiff must treat the defendant as the "publisher or speaker" of the harmful information at issue. The information must be "provided by another information content provider", i.e., the defendant must not be the "information content provider" of the harmful information at issue.

Section 230 immunity is not unlimited. The statute specifically excepts federal criminal liability (§230(e)(1)), electronic privacy violations (§230(e)(4)) and intellectual property claims (§230(e)(2)).See (no immunity for contributory liability for trademark infringement). There is also no immunity from state laws that are consistent with though state criminal laws have been held preempted in cases such as Backpage.com, LLC v. McKenna and Voicenet Communications, Inc. v. Corbett (agreeing that "the plain language of the CDA provides ... immunity from inconsistent state criminal laws"). What constitutes "publishing" under the CDA is somewhat narrowly defined by the courts. The Ninth Circuit held that "Publication involves reviewing, editing, and deciding whether to publish or to withdraw from publication third-party content."Barnes v. Yahoo!, Inc. , 570 F.3d 1096 at 1102 (9th Cir. 2009). Thus, the CDA does not provide immunity with respect to content that an interactive service provider creates or develops entirely by themselves.Anthony v. Yahoo! Inc., 421 F.Supp.2d 1257 (N.D.Cal. 2006) CDA immunity also does not bar an action based on promissory estoppel.Barnes v. Yahoo! Inc., 570 F.3d 1096 (9th Cir. 2009). As of mid-2016, courts have issued conflicting decisions regarding the scope of the intellectual property exclusion set forth in §230(e)(2). For example, in Perfect 10, Inc. v. CCBill, LLC, the 9th Circuit Court of Appeals ruled that the exception for intellectual property law applies only to federal intellectual property claims such as copyright infringement, trademark infringement, and patents, reversing a district court ruling that the exception applies to state-law right of publicity claims.Cf. (dismissing, inter alia, right of publicity claim under Section 230 without discussion). But see (230 does not immunize against state IP claims, including right of publicity claims). The 9th Circuit's decision in Perfect 10 conflicts with analysis in other courts including Doe v. Friendfinder (2008). The Friendfinder court specifically discussed and rejected the 9th Circuit's reading of "intellectual property law" in CCBill and held that the exception for intellectual property law applies to both federal and state intellectual property claims, including state right of publicity claims.

Two bills passed since the passage of Section 230 have added further limits to its protections. The Digital Millennium Copyright Act in 1998, service providers must comply with additional requirements for copyright infringement to maintain safe harbor protections from liability, as defined in the DMCA's Title II, Online Copyright Infringement Liability Limitation Act. The Stop Enabling Sex Traffickers Act (the FOSTA-SESTA act) of 2018 eliminated the safe harbor for service providers in relationship to federal and state sex trafficking laws.

While Section 230 provides a defense from liability, the Ninth Circuit ruled that it is not equivalent to immunity from lawsuits related to user content. This came as part of an August 2026 decision against Meta and other social media companies defending themselves from lawsuits claiming their services were designed to be addictive to children.

Background and passage Prior to the Internet, case law was clear that a liability line was drawn between publishers of content and distributors of content; a publisher would be expected to have awareness of material it was publishing and thus should be held liable for any illegal content it published, while a distributor would likely not be aware and thus would be immune. This was established in the 1959 case, Smith v. California, where the Supreme Court ruled that putting liability on the provider (a book store in this case) would have "a collateral effect of inhibiting the freedom of expression, by making the individual the more reluctant to exercise it."

In the early 1990s, the Internet became more widely adopted and created means for users to engage in forums and other user-generated content. While this helped to expand the use of the Internet, it also resulted in a number of legal cases putting service providers at fault for the content generated by its users. This concern was raised by legal challenges against CompuServe and Prodigy, which were early service providers at that time. CompuServe stated it would not attempt to regulate what users posted on its services, while Prodigy had employed a team of moderators to validate content. Both companies faced legal challenges related to content posted by their users. In Cubby, Inc. v. CompuServe Inc., CompuServe was found not to be at fault as, by its stance as allowing all content to go unmoderated, it was a distributor and thus not liable for libelous content posted by users. However, in Stratton Oakmont, Inc. v. Prodigy Services Co., the court concluded that because Prodigy had taken an editorial role with regard to customer content, it was a publisher and was legally responsible for libel committed by its customers.Stratton Oakmont, Inc. v. Prodigy Services Co., 31063/94, 1995 WL 323710, 1995 N.Y. Misc. LEXIS 712 (N.Y. Sup. Ct. 1995).

Service providers made their Congresspersons aware of these cases, believing that if followed by other courts across the nation, the cases would stifle the growth of the Internet. United States Representative Christopher Cox (R-CA) had read an article about the two cases and felt the decisions were backwards. "It struck me that if that rule was going to take hold then the internet would become the Wild West and nobody would have any incentive to keep the internet civil," Cox stated.

At the time, Congress was preparing the Communications Decency Act (CDA), part of the omnibus Telecommunications Act of 1996, which was designed to make knowingly sending indecent or obscene material to minors a criminal offense. A version of the CDA had passed through the Senate pushed by Senator J. James Exon (D-NE). People in a grassroots effort in the tech industry reacted to try to convince the House of Representatives to challenge Exon's bill. Based on the Stratton Oakmont decision, Congress recognized that requiring service providers to block indecent content would make them be treated as publishers in the context of the First Amendment, and thus would make them become liable for other content such as libel, not set out in the existing CDA. Cox and fellow Representative Ron Wyden (D-OR) wrote the House bill's section 509, titled the Internet Freedom and Family Empowerment Act, designed to override the decision from Stratton Oakmont, so that a service provider could moderate content as necessary and would not have to act as a wholly neutral conduit. The new provision was added to the text of the proposed statute while the CDA was in conference within the House.