The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal …

U.S. facts and figures Learn about the United States, including American history, the president, holidays, the American flag, census data, and more.

2025年9月30日 · America in Brushstrokes Discover eight historic landscape paintings that capture the regional splendor of the United States.

2025年9月28日 · Besides the 48 conterminous states that occupy the middle latitudes of the continent, the United States includes the state of Alaska, at the northwestern extreme of North …

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2025年10月1日 · Explore All Countries United States North America Page last updated: September 03, 2025

The US federal government’s finances affect nearly every aspect of daily life, from the roads people drive on to the taxes they pay. Explore data on how the government collects and …

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This article lists the 50 states of the United States. It also lists their populations, the date they became a state or agreed to the United States Declaration of Independence, their total area, …

We provide science about the natural hazards that threaten lives and livelihoods; the water, energy, minerals, and other natural resources we rely on; the health of our ecosystems and …