What Are the Farthest Points in the United States?

1903 map of Alaska
Map of Alaska and Siberia, 1903. Historical Mapps LLC/Getty Images

What is the northernmost state in the United States? If you say Alaska, then you would be correct. What about the state that is the farthest east? This is a trick question. Although you might guess Maine, technically the answer might be considered Alaska as well.

Determining which state is the farthest north, south, east, and west in the United States depends on your perspective. Are you looking at all 50 states or just the lower 48? Are you considering the way it looks on a map or judging by the lines of latitude and longitude? Let's break it down and look at the facts from all perspectives.

The Farthest Points in the Entire United States

Are you ready for a fun trivia fact to astound your friends? Alaska is the state that is the farthest north, east, and west. 

The reason that Alaska is the farthest east and west is that the Aleutian Islands cross the 180-degree meridian of longitude. This places some of the islands in the Eastern Hemisphere and thus degrees east of Greenwich (and the prime meridian). Also, by this definition, the point farthest to the east is right next to the point farthest to the west: literally, where east meets west.

Now, to be practical and avoid the riddle, we need to look at a map. Without taking into account the prime meridian, we understand that locations to the left of the map are considered to be west of any points to their right.

This makes the question of which state is the farthest east much more obvious.

  • The easternmost state is Maine at the West Quoddy Head lighthouse (66 degrees 57 minutes west).
  • The northernmost state is Alaska at Point Barrow (71 degrees 23 minutes north).
  • The westernmost state is also Alaska at Cape Wrangell on Attu Island (172 degrees 27 minutes east).
  • The southernmost state is Hawaii at Ka Lae (18 degrees 55 minutes north).

The Farthest Points in the Lower 48 States

If you're considering only the 48 contiguous (lower) states, then we eliminate Alaska and Hawaii from the equation.

  • The easternmost state is Maine, marked by the West Quoddy Head Lighthouse (66 degrees 57 minutes west).
  • The northernmost state is Minnesota at Angle Inlet (49 degrees 23 minutes north).
  • The westernmost state is Washington at Cape Alava (124 degrees 44 minutes west).
  • The southernmost state is Florida, marked by a buoy in Key West (24 degrees 32 minutes north). On the U.S. mainland, it is Cape Sable, Florida (25 degrees 7 minutes north)

In this case, it may appear on the map that Maine is farther north than Minnesota. However, the Angle Inlet of northern Minnesota at 49 degrees 23 minutes north is north of the 49-degree boundary between the United States and Canada. This is well north of any point in Maine, no matter how the map looks. To get there, you either have to cross a lake or the Canadian border.