How does U.S. law distinguish obscenity from pornography?

In U.S. law, the terms "obscenity" and "pornography" are not synonymous. While pornography refers broadly to sexually explicit material, only a narrow subset of such material is legally classified as obscenity and thus subject to government restriction or criminal punishment.1

The legal distinction is primarily defined by the three-part test established by the U.S. Supreme Court in Miller v. California (1973). For material to be legally deemed obscene, it must meet all three of the following criteria:

• The average person, applying contemporary community standards, would find that the work appeals primarily to prurient (shameful or morbid) interests.21
• The work depicts or describes sexual conduct in a patently offensive way, as specifically defined by applicable state law.2
• The work, taken as a whole, lacks serious literary, artistic, political, or scientific value.21

Material that does not meet this strict threshold is generally protected under the First Amendment. Conversely, child pornography is treated as a distinct, more strictly regulated category because the government has a compelling interest in protecting children from sexual exploitation, regardless of whether the material meets the Miller obscenity test.312