The following outline is provided as an overview of and topical guide to the U.S. state of Maryland: Maryland – U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east. Maryland was the seventh state to ratify the United States Constitution, and three nicknames for it (the Old Line State, the Free State, and the Chesapeake Bay State) are occasionally used. The state's most populated city is Baltimore. Its capital is Annapolis.