The currency of the United States is the United States dollar (USD). It is often symbolized by the dollar sign ($) and is subdivided into 100 smaller units called cents. The U.S. dollar is one of the most widely used currencies in the world, serving as a standard for international trade and a reserve currency for many governments and institutions. The U.S. dollar features a variety of denominations in both paper and coin forms, with common paper denominations being $1, $5, $10, $20, $50, and $100. The Federal Reserve issues and regulates the currency to ensure stability and trust in the financial system.