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 Idaho, Peeping Tom laws are addressed under the state's voyeurism statutes. Idaho Code § 18-6609 makes it a felony for any person to secretly or surreptitiously use any device, including but not limited to periscopes, telescopes, binoculars, drones, cameras, or mobile phones, to watch or record another person without that person's consent when the person being watched or recorded is in a place where he or she has a reasonable expectation of privacy. This includes places like bedrooms, bathrooms, changing rooms, or any other place where a person might disrobe. The law also covers situations where the individual being observed is in their dwelling or any other private place where one would reasonably expect privacy. The statute is designed to protect individuals from having their privacy invaded for another person's sexual gratification. Additionally, Idaho law considers it a crime to disseminate any images or recordings obtained through such voyeuristic activities. Violation of these laws can result in serious criminal penalties, including imprisonment and fines.