The Seven Denominations. The Federal Reserve Board currently issues $1, $2, $5, $10, $20, $50, and $ notes. Click. The United States issues several. USA Currency Coins · Common Coins. Penny. Worth 1 cent. A penny is a copper-plated zinc coin. · Nickel. Worth 5 cents. It is made of a nickel and copper blend. In addition, the note includes a color-shifting numeral 10 in the lower right corner of the note. These rare bills depicted contemporary American gold coins on the back, using gold-brown ink and yellowish paper. The World's Reserve Currency Part of the reason for the dollar's strength is its role as the world's reserve currency. Paper currency less than one dollar in denomination, i. All US currency has a life cycle; new notes are made to replace old ones and the old ones are american currency bills and coins.