The United States, often referred to as the US, is a country located in North America. It is made up of 50 states, a federal district, and several territories. The capital city is Washington, D.C., while the largest city is New York City. The US has a diverse population and is known for its cultural, economic, and political influence worldwide. The US operates under a federal government system, which divides powers between the national and state governments. The country is a constitutional republic, meaning it has an elected president and a system of laws that protect individual rights. The US Constitution serves as the foundation of its legal framework.