Peeping Tom laws—also known as voyeurism laws or invasion of privacy laws—generally make it illegal and a criminal offense to peek into windows or doors on private property to view a person who is fully or partially naked for the purpose of sexual desire or gratification.

Peeping Tom laws vary from state to state and some states require that the victim not realize he or she was being viewed and that the victim had a reasonable expectation of privacy (was in a place where it was reasonable to expect privacy). And some states specifically address the use of unmanned aircraft (drones), cameras, video cameras, and binoculars in connection with such peeping. Some state statutes specifically prohibit peeking into bathrooms, dressing rooms, showers, and baths. And some states characterize this criminal offense as trespassing with the intent to peer or peep.

Peeping Tom laws are located in a state’s statutes—often in the penal or criminal code.

In South Carolina, Peeping Tom laws are addressed under the state's invasion of privacy statutes. Specifically, South Carolina Code of Laws Section 16-17-470 makes it unlawful for a person to be a 'Peeping Tom' on or about the premises of another or to go upon the premises of another for the purpose of becoming a 'Peeping Tom.' The law defines a 'Peeping Tom' as someone who peeps through windows, doors, or other like places, on or about the premises of another, for the purpose of spying on or invading the privacy of the persons inside. It also covers the act of secretly observing or filming another person in a state of undress or of a private nature without consent, where the person has a reasonable expectation of privacy. The use of electronic devices such as cameras and drones for such purposes can also be prosecuted under this statute. Violation of these laws is considered a misdemeanor in South Carolina, and if convicted, the offender may face fines, imprisonment, or both. Additionally, South Carolina law addresses trespassing with the intent to invade privacy, which can elevate the charges and penalties if such intent is proven.