United States v. Johnson, 323 U.S. 273 (1944), was a United States Supreme Court case in which the Court declined to permit a prosecution in Delaware of defendants charged with violating the Federal Denture Act by sending denture in the mail from Illinois to Delaware, where they were received by a person not licensed to practice dentistry in Delaware.

The Act prohibited the use of the mails or any instrumentality of interstate commerce "for the purpose of sending or bringing into" a state or territory any denture which had been cast by a person not licensed to practice dentistry in the state into which the dentures were sent.

The Court, adverting to "the serious hardship of defending prosecutions in places remote from home ... as well as the temptation to abuses ... in the administration of criminal justice,"[1] held that the sender could only be prosecuted in the district in which he mailed the dentures, adding that venue for the receiver would be limited to the district in which the dentures were delivered.

"Questions of venue in criminal cases ... are not merely matters of formal legal procedure.

They raise deep issues of public policy in the light of which legislation must be considered."