About: List of former United States counties

This is a list of former United States counties, a list of United States counties (administrative subunits of a U.S. state) that no longer exist. They were established by a state, provincial, colonial, or territorial government. Most of these counties were created and disbanded in the 19th century; county boundaries have changed little since 1900 in the vast majority of states. A county is repeated on the list if its jurisdiction changed from one state, colony, or territory to another.