Florida.
South is Florida. North is Lake of the Woods Minnesota.
Florida (24.45° north latitude)
The US state that is furthest south in the continental 48 states is Florida. Hawaii is by far the furthest south of all US states (18 degrees, 55 minutes).
Minnesota is the farthest north state in the lower 48. The city of Warroad is the farthest northern city in the lower 48 states.
Northwest Angle, Minnesota
Maine
Alaska is the farthest north.Excluding Alaska, Minnesota is the northernmost of the lower 48 states.
Hawaii has the southernmost geographic center of all the states. Florida has the southernmost geographic center of the 48 contiguous states.
In the contiguous 48 states, Minnesota extends slightly farther north than other western states (Washington, Idaho, Montana, North Dakota).The farthest south is Florida, where the Keys extend below 25°N latitude, the approximate southern limit of Texas.
Alaska is the US state that is the farthest north and the farthest west. However, if you are asking about the 48 contiguous US states, Washington state is the most northwestern US state.
Maine