No, obscenity is not protected by the First Amendment. The Supreme Court has ruled that certain forms of speech, including obscenity, are not protected by the First Amendment because they do not contribute to the marketplace of ideas. Obscenity is defined as material that is sexually explicit and without serious literary, artistic, political, or scientific value. The Court has held that obscenity is not protected by the First Amendment because it lacks the necessary social value to justify its protection.