A slang term used for the United States dollar.

Greenback, Tennessee, a city in Loudon County, Tennessee, United States

United States Note, among the first national United States currency, authorized by the Legal Tender Act of 1862. This was government-issued currency, different from the central-bank currency that the United States uses today.

United States Greenback Party, an American political party that was active between 1874 and 1884 which advocated government-issued currency.

Greenback cutthroat trout, (Oncorhynchus clarki stomias), the easternmost subspecies of cutthroat trout

Celestion G-12, guitar cabinet loudspeakers

an alternate name for the Bar jack, or Caranx ruber

Save the Greenback, U.S. Bureau of Engraving and Printing employees, and paper and ink suppliers, opposed to phasing out the paper dollar