Hawaii extends the farthest south.
Pennsylvania
Florida extends the farthest south of the United States.
If you mean the northernmost state then it is Alaska.
The North American country that extends farthest East is Canada. The state of Maine in the United States is the most eastern state.
Brazil is the South American country that extends the farthest east.
Maine is the state that extends the farthest east in the United States. Its easternmost point is West Quoddy Head, which is the easternmost point of the contiguous United States.
Virginia
Antarctica extends farthest south of any continent.
The farthest north country is Denmark (via Greenland). The farthest east country is Kiribati.
The US State of Virginia extends further west than either West Virginia or New York.
Brazil is the Latin American country that extends farthest south.