What is the capital of the United States?

The capital of the United States is Washington D.C., which serves as the political center of the country. It was chosen as the capital in 1790 and is home to the federal government, including the President's residence (the White House), the Capitol building where Congress meets, and the Supreme Court. Washington D.C. was established specifically to create a neutral ground for the government, distinct from the influence of existing cities like New York City and Philadelphia, which were capitals before it. This unique status allows it to be a focal point for national governance and symbolically represents the unity and function of the federal government. The other locations listed, while being major cities in the U.S., do not serve the role of the national capital.