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The United States dollar (or American dollar) is the official currency of the United States of America. It is also used in some other countries outside the US. It is the standard currency for international markets selling goods such as gold and oil . When writing, the symbol for the American dollar is the dollar sign ($).

The United States enjoys some benefits because the dollar serves as the international reserve currency. The United States is less likely to face a balance of payments crisis. Fiat standard. Today, like the currency of most nations, the dollar is fiat money, unbacked by any physical asset.

Coins of the United States dollar (aside from those of the earlier Continental currency) were first minted in 1792. New coins have been produced annually and they make up a valuable aspect of the United States currency system. Today, circulating coins exist in denominations of 1¢ (i.e. 1 cent or $0.01), 5¢, 10¢, 25¢, 50¢, and $1.00.