Looking at a map, Alaska is clearly the most northern state in the U.S., and Hawaii, at 20º North, is without doubt the most southern state.
As far as the most western state, Alaska’s Aleutian Islands stretch right up to the edge of the Western Hemisphere at the 180º line of Longitude, thus the most western state in the country. And, Alaska is also the answer for eastern, as the Aleutian Islands stretch across the 180º line of Longitude, into the Eastern Hemisphere, and up the edge of the Russian Federation.
According to worldatlas.com, if you exclude Alaska and Hawaii, the answers are:
- Most Northern Point: Angle, Minnesota, at 49º 23’N;
- Most Southern Point: East Cape, Florida, at 25º 7’N;
- Most Eastern Point: West Quoddy Head, Maine, at 66º 57’W; and
- Most Western Point: Cape Alva, Washington, at 124º 44’W.