United States capital was established temporarily in New York in 1788 by the Constitutional Convention. The city remained the capital until August 12, 1790. The capital moved back to Philadelphia before it finally moved to Washington, DC. The United States capital actually resided in nine locations before remaining in Washington, DC.
Map of Nation’s Capital (Residence Act)
Maryland in 1788 donated ten square miles of land to the United States. This land became part of the District of Columbia. Our Founding Fathers wanted to establish a new capital, rather than use an existing city such as New York or Philadelphia. The Residence Act gave George Washington the authority to decide where to locate the new nation’s capital. The Maryland land was in about the middle of the country at that time. Children can view the documents that made the District of Columbia possible at: District of Columbia.