The United States covers about 3.8 million square miles (roughly 9.8 million square kilometers), making it one of the four largest countries on Earth by total area.

Quick Scoop

  • Total area: about 3,796,000–3,800,000 square miles, depending on how coastal and territorial waters are counted.
  • Land area: about 3,532,000 square miles of land.
  • Water area: roughly 265,000 square miles of lakes, rivers, and other inland waters.
  • Global rank: around 3rd–4th largest country in the world by area, close in size to China and Canada.
  • Shape on the map: stretches about 2,800 miles east–west and about 1,600 miles north–south across the contiguous states.

How that size feels in practice

  • The U.S. is about half the size of Russia , the world’s largest country.
  • It is slightly smaller than Canada and similar in scale to China.
  • Within that space you get huge variety: Arctic conditions in Alaska, tropical climates in Hawaii and Florida, deserts in the Southwest, and vast plains in the Midwest.

A tiny comparison story

Imagine starting a road trip in Maine on the Atlantic coast and driving all the way to California on the Pacific.
You would cross thousands of miles of highways and multiple time zones and still be within the same country the whole way, which gives a good everyday sense of just how vast the United States really is.

Information gathered from public forums or data available on the internet and portrayed here.