Arlington County Board v. Richards, 434 U.S. 5 (1977), is a United States Supreme Court decision on the application of the Equal Protection Clause of the Fourteenth Amendment to the Constitution to municipal parking restrictions. In a unanimous per curiam opinion, the Court held that a residential zoned parking system requiring permits for daytime parking in the Aurora Highlands neighborhood of Arlington County, Virginia, with those permits limited to residents, their guests and those who came to their homes for business purposes had a rational basis and was thus constitutional. Its decision overturned the Virginia Supreme Court.