Canceled denominations of United States currency

This article is about denominations of the United States dollar that were not released for circulation. For denominations that were circulated but later withdrawn, see Obsolete denominations of United States currency.

The United States has several coins and banknotes which were proposed at one time but never adopted.

Banknotes

A three dollar bill was proposed two times during the 1860s. A design was engraved for a potential $3 United States Note, and a 1865 law called for a $3 National Bank Note, but neither proposal came to fruition.

Denomination	Obverse	Reverse	Notes
$3 note	250px	250px	Not to be confused with fake or privately issued obsolete notes or the three-dollar Continental currency banknotes issued during the American Revolution

Coinage

There have been several United States coins which were proposed but never adopted. Most of the coins listed below, although never adopted, were produced in limited numbers as patterns.

Denomination	Obverse	Reverse	Weight	Diameter	Material	Edge	Minted	Notes
Silver center cent 1¢	File:1792 Silver center cent pattern, obverse.jpg	File:1792 Silver center cent pattern, reverse.jpg	4.48 g	24.00 mm	Cu (ring) Ag (plug)	reeded	1792	The first and only US bi-metallic coin until the 2000 Library of Congress ten dollar coin.
Ring cent 1¢	File:1850 P1C One Cent, Judd-119 Original, Pollock-134, Low R.6.jpg	File:1850 P1C One Cent, Judd-119 Original, Pollock-134, Low R.6 rev.jpg	various weights		90% Cu 10% Ag	various	1850–1851, 1853, 1884–1885	196 ring cents (originals and restrikes) are known to exist. Examples exist with or without a hole.
Aluminum cent 1¢	File:1974Aluminumfront.jpg	File:1974Aluminumback.jpg	0.937 g	19.05 mm	96% Al 4% trace metals	plain	1973–1975
Two-cent billon 2¢	File:1836 P2C Two Cents (Judd-52) (obv).jpg	File:1836 P2C Two Cents (Judd-52) (rev).jpg	3.84 g	~13.00 mm	90% Cu 10% Ag	plain	1836
Two and a half cent piece 2.5¢			unknown	unknown	unknown	unknown	never minted	Proposed in 1916 by US mint director Robert W. Woolley. Civil War tokens of this denomination exist.
Three-cent bronze 3¢	File:1863 3C Three Cents, Judd-319 Restrike, Pollock-384, R.5.jpg	File:1863 3C Three Cents, Judd-319 Restrike, Pollock-384, R.5 rev.jpg	10.89 g	28.57 mm	95% Cu 5% Zn	plain	1863
Ring nickel 5¢	File:1884 ring nickel (obverse).jpg	File:1884 ring nickel (reverse).jpg				plain	1884–1885
Gold ring half dollar 50¢	File:1852 gold ring half dollar (obverse).jpg	File:1852 gold ring half dollar (reverse).jpg					1852
Gold ring dollar $1	File:1852 gold ring dollar (obverse).jpg	File:1852 gold ring dollar (reverse).jpg					1849, 1852
Two dollar piece $2			unknown	unknown	unknown	unknown	never minted	Proposed but not minted. Some privately struck renditions exist.
Stella $4	File:1879 Flowing Hair Stella obverse.png	File:1879 Flowing Hair Stella reverse.png	7.00 g	22 mm	6.00g Au 0.30g Ag 0.70g Cu	reeded	1879–1880
Half-union $50	File:1877 $50 Fifty Dollar pattern (Judd-1547, Pollock-1720) Obverse.jpg	File:1877 $50 Fifty Dollar pattern (Judd-1547, Pollock-1720) Reverse.jpg	83.58 g	50.80 mm	90% Au 10% Cu	reeded	1877	Commemorative coins of this denomination were issued in 1915. Several bullion coins are produced in this denomination.
Union $100	File:Proposed $100 Gold Union, obverse.jpg	File:Proposed $100 Gold Union, reverse.jpg	unknown	unknown	90% Au 10% Cu	unknown	never minted	Canceled before any patterns could be minted (fantasy coin shown). Some commemorative and bullion coins are minted in this denomination.

Notes

^α Pattern coins for the ring cent were struck in various metals, including copper, aluminum, and nickel, as well as billon.

^β 1853 ring cents are restrikes dated 1850, although they can be distinguished from the original 1850 cents in that they use a different reverse design.

^γ Although circulation strikes of the Half Union were to be 90% gold 10% copper, only two of the twenty known pattern coins were struck with this composition. The other 18 were struck in 100% copper, although some were later plated with gold by the mint.