Morgan v. Struthers is a United States Supreme Court case that was decided in 1891. The case involved a challenge to an Ohio law that prohibited door-to-door solicitation of religious materials. The law was challenged by a religious group that wanted to distribute religious materials door-to-door. The Supreme Court held that the Ohio law was constitutional. The Court reasoned that the law was a valid exercise of the state's police power to protect its citizens from unwanted solicitations. The Court also noted that the law was not aimed at any particular religion, and that it was not an infringement on the free exercise of religion. The Court's decision in Morgan v. Struthers has been cited in numerous subsequent cases involving the regulation of door-to-door solicitation. The case is an important precedent for the regulation of door-to-door solicitation, and it has been cited in numerous cases involving the regulation of religious activities.

In Morgan v. Struthers, the Supreme Court was asked to decide whether a city ordinance in Ohio that prohibited door-to-door distribution of circulars and other literature without first obtaining permission from the occupant of the house violated an individual's right to free speech under the First Amendment. The majority opinion held that it did not violate this right because there is no constitutional guarantee for individuals to distribute literature on private property without consent from its owner or occupant. Justice Harlan dissented, arguing that while states have a legitimate interest in protecting their citizens' privacy rights, such interests must be balanced against those of freedom of expression which are guaranteed by both state and federal constitutions. He argued further that since door-to-door solicitation does not involve any physical trespass onto private property, it should be protected as part of an individual's right to free speech regardless if they obtain prior permission or not.