The Real Extreme Points of the USA

Crowds queue every day for a photo beside Key West’s famous Southernmost Point buoy. It isn’t the southernmost point of the United States, or even of Key West. The island’s true southern tip is about 900 feet away, on Navy land the public can’t enter.

Right now, you can’t even get to the buoy. It has been boxed off since September 2025 for seawall repairs, so visitors pose beside a temporary replica on Duval Street instead. You can watch both live:

The bigger problem is that “northernmost”, “southernmost”, “easternmost” and “westernmost” sound simple, but they depend on what counts as land. Do you mean the mainland? Any rock above water? A reef that only appears at low tide? So for each direction, we give the answer and the rule behind it.

North: Northwest Angle, Minnesota

The northern tip of the lower 48 is a strange piece of Minnesota called the Northwest Angle, or simply “the Angle”. On a map it looks as though someone left a small piece of America sticking into Canada, and that’s not far from what happened.

The 1783 Treaty of Paris drew the border using inaccurate maps of the Lake of the Woods area, and when later agreements matched it to the real geography, a chunk of US land was left north of the 49th parallel.

The result: there’s no road to the Angle from the rest of Minnesota without driving through Canada first. North is also the only direction with one simple answer. No offshore rocks or low-tide reefs change it.

East: West Quoddy Head

The easternmost point of the US mainland is West Quoddy Head, Maine, home to the red-and-white striped West Quoddy Head Light. Its first lighthouse went up in 1808, during Thomas Jefferson’s presidency, and the striped tower you see today dates from 1858.

And yes, the easternmost point is called West Quoddy Head, because it sits just west of East Quoddy Head, across the water in Canada.

…unless you count Sail Rock

Just offshore, Sail Rock sits slightly farther east. It’s a bare rock, with Little Sail Rock beside it on the same ledge, and it stays above water even at high tide, so if offshore land counts, Sail Rock wins. West Quoddy Head is still the one you can actually stand on.

South: Cape Sable, Florida

…or Ballast Key, or Western Dry Rocks

The southernmost point of the US mainland is Cape Sable, on the southwestern tip of Florida. It’s actually north of Key West, which sounds wrong until you remember Key West is an island.

Count islands, and the answer moves to Ballast Key, southwest of Key West. It’s the southernmost land in the lower 48 that stays above water at high tide, and it’s farther south than the famous buoy.

The map below puts it side by side with Key West.

Go one step further and count reefs that only appear at low tide, and the winner is Western Dry Rocks, a reef southwest of Key West that’s occasionally exposed by the tide.

So that’s three answers before you even get to the tourist marker. Key West’s buoy is best seen as what it was built to be: a brilliant landmark, not a survey marker.

West: Cape Alava, Washington

…or the Bodelteh Islands, or Umatilla Reef

The westernmost point of the US mainland is Cape Alava, on the wilderness coast of Olympic National Park, Washington. There’s no road to the cape and no giant sign. From the road’s end at Ozette, you walk about three miles through forest and prairie, then step out among sea stacks and tide pools.

Count offshore land, and the answer moves to the Bodelteh Islands, a small group of rocky islands just west of the cape where seabirds nest.

Go one step further and count low tide, and the winner is Umatilla Reef, west of the islands, which only breaks the surface when the tide drops. West mirrors south: one mainland answer, one island answer and one low-tide answer.

Add Alaska and Hawaii

Everything so far covers the lower 48. Add the 49th and 50th states and the map changes completely.

North moves to Point Barrow, known locally as Nuvuk, on Alaska’s Arctic coast, where the Chukchi and Beaufort seas meet.

The coast here is changing fast. USGS cameras installed in 2021 were shut down in September 2025 because erosion was eating away the site.

You can catch Alaska’s northern lights live from Fairbanks:

South moves to Ka Lae, or South Point, on Hawaii’s Big Island. The area is a National Historic Landmark, linked to some of the earliest known settlement in the Hawaiian Islands.

On the same island, Kīlauea is one of the world’s most active volcanoes:

East Becomes West

East and west are where it gets strange. Alaska’s Aleutian Islands stretch across the 180° line, where longitude flips from east to west.

Measured the way USGS does it, by east and west longitude, the easternmost point of the United States is Pochnoi Point on Semisopochnoi Island, Alaska. The westernmost is the west point of Amatignak Island, also in Alaska. They sit on opposite sides of the 180° line, just 63 statute miles apart.

So Alaska takes north, east and west, and Hawaii takes the south.

Measure the country’s full east–west spread across the 180° line instead, and the answers change again. Sail Rock in Maine becomes the easternmost point, and Peaked Island, off Attu at the far end of the Aleutians, becomes the westernmost, or strictly, a small rock just west of it. Neither system is wrong. They just answer slightly different questions.

Where’s the Middle of America?

Finding the centre sounds easier than finding the edges, but USGS says there’s no single accepted way to calculate it. Coastlines, islands and lakes all complicate the answer.

For the lower 48, USGS puts the geographic centre near Lebanon, Kansas. The classic method treats the country like a flat cardboard cutout and finds the point where it would balance.

For all 50 states, the centre moves to Butte County, South Dakota, west of Castle Rock. The nearby town of Belle Fourche has a Center of the Nation monument for visitors, but the calculated point is about 20 miles away, on private land.

It’s a neat echo of Key West: the marker people visit and the calculated point aren’t in the same place.

Not So Simple After All

Maps give us neat borders and tidy labels. The real world gives us islands, tides, old treaties, bare rocks, reefs and monuments built away from the points they celebrate. And that’s before you add US territories like Guam and American Samoa, which shift the answers all over again.

America doesn’t have four simple corners. It has a set of answers that change with the rules, and if you follow the map far enough, east eventually becomes west.

So unless someone finds another inconvenient rock sticking out of the ocean, these are the answers, for now.

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