Jim McMahon/Mapman®
The state of Maryland donated the land that is now Washington, D.C.
It’s a city. But unlike other cities, it is also a federal district that was created for the sole reason of being the nation’s capital.
America’s Founders worried that if the nation’s capital were located in a state, that state might have too much power over the federal (national) government. So they wrote in the Constitution that the nation’s capital should be located in a federal district that isn’t part of any state. The federal government moved to the District of Columbia in 1800.