Sex crime is a broad category that generally involves acts of unwanted physical contact for the purpose of sexual gratification or intimidation. Many sex crimes are considered felonies. Physical contact is "unwanted" if the victim did not legally consent to such contact. Examples include saying "no", physically objecting and being intoxicated or incapacitated to the point of not being able to give consent.

In some states, laws include provisions against aggressive sexually suggestive statements even where no physical contact occurs. Specific sexual offenses include Child Abuse, Child Enticement, Child Pornography, Child Procurement, Child Exploitation, Date Rape, Failure to Register, Indecent Exposure, Internet Porn, Lewd and Lascivious, Lewd Conduct, Marital Rape, Molestation, Obscenity, Pedophilia, Pimping/Pandering, Pornography, Prostitution, Rape, Sexual Offense, Sexual Abuse, Sexual Assault, Sexual Harassment, Sodomy and Statutory Rape.