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 Kansas, Peeping Tom laws are addressed under the state's invasion of privacy statutes. Kansas law makes it illegal to knowingly and without lawful authority enter into or remain within any private property with the intent to invade the privacy of another person. This includes situations where an individual is fully or partially undressed and has a reasonable expectation of privacy, such as in bathrooms, bedrooms, or changing rooms. The use of any device, such as cameras, binoculars, or drones, to observe, photograph, or record a person in a private place without consent for the purpose of sexual arousal or gratification is also prohibited. These actions are considered a breach of privacy and are typically classified as misdemeanors, but can escalate to felony charges depending on the circumstances, such as if the offense is committed against a child or if the perpetrator has prior convictions. Kansas law reflects a broader concern for the protection of individual privacy and the prevention of sexual exploitation.