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 Indiana, Peeping Tom laws are addressed under the state's voyeurism and invasion of privacy statutes. Indiana Code § 35-45-4-5 makes it a criminal offense to peep or spy into an area where a person has a reasonable expectation of privacy, such as a dwelling, for the purpose of sexual gratification. This includes situations where the individual is fully or partially naked. The law also covers the use of cameras, binoculars, or other devices to commit such acts. Additionally, Indiana law prohibits the use of unmanned aerial vehicles (drones) for voyeurism under Indiana Code § 35-45-4-5(c). The offense can range from a Class A misdemeanor to a Level 6 felony, depending on the circumstances, such as prior convictions or if the victim is a minor. It is important to note that the victim does not need to be aware that they are being watched for the offense to occur. Furthermore, Indiana's criminal trespass statute, Indiana Code § 35-43-2-2, may also apply if someone enters property with the intent to invade privacy, which can be considered trespassing with the intent to peer or peep.