Coins of the United States dollar
Coins of the United States dollar were first minted in 1792. New coins have been produced annually since then 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. Also minted are bullion (including gold, silver and platinum) and commemorative coins. All of these are produced by the United States Mint. The coins are then sold to Federal Reserve Banks which in turn are responsible for putting coins into circulation and withdrawing them as demanded by the country's economy.
Today four mints operate in the United States producing billions of coins each year. The main mint is the Philadelphia Mint, which produces circulating coinage, mint sets and some commemorative coins. The Denver Mint also produces circulating coinage, mint sets and commemoratives. The San Francisco Mint produces regular and silver proof coinage, and produced circulating coinage until the 1970s. The West Point Mint produces bullion coinage (including proofs). Philadelphia and Denver produce the dies used at all of the mints. The proof and mint sets are manufactured each year and contain examples of all of the year's circulating coins.
The producing mint of each coin may be easily identified, as most coins bear a mint mark. The identifying letter of the mint can be found on the front side of most coins, and is often placed near the year. Unmarked coins are issued by the Philadelphia mint. Among marked coins, Philadelphia coins bear a letter P, (except for cents, which display no mint mark if made by the Philadelphia mint) Denver coins bear a letter D, San Francisco coins bear a letter S, and West Point coins bear a letter W. S and W coins are rarely, if ever, found in general circulation, although S coins bearing dates prior to the mid-1970s are in circulation. The CC, O, C, and D mint marks were used on gold and silver coins for various periods in the mid-nineteenth century until the early twentieth century by temporary mints in Carson City, Nevada; New Orleans, Louisiana; Charlotte, North Carolina; and Dahlonega, Georgia; respectively: most such coins still extant are now in the hands of collectors and museums.
Coins in circulation
|1¢||19.05 mm||1.55 mm||1909-1942, 1944-1982
|plain||Abraham Lincoln||Wheat||1909–1958||wide2||wheat cent, wheat penny|
|19.05 mm||Lincoln Memorial||1959–2008||wide||cent, penny|
|see article: 2009 Redesign||1982-present
|Lincoln bicentennial designs||2009|
|5¢||21.21 mm||1.95 mm||5.00 g||copper 75%
|plain||Thomas Jefferson (profile)||Monticello||1938–1942, 1946–2003||wide||nickel|
|see article: Westward Journey nickel||Lewis & Clark bicentennial designs||2004–2005|
|Thomas Jefferson (portrait)||Monticello||2006–present|
|10¢||17.91 mm||1.35 mm||2.268 g
|118 reeds||Franklin D. Roosevelt||torch, oak branch, olive branch||1965–present||wide||dime|
|25¢||24.26 mm||1.75 mm||5.67 g
|119 reeds||George Washington||Bald eagle||1965–1974, 1977–19985||wide||quarter|
|Bicentennial colonial military drummer||(1975) 19765|
|See article: 50 State Quarters||State Quarter Series||1999–2008|
|See article: D.C. and U.S. Territories Quarters||D.C. and U. S. Territories Quarters||2009|
|See article: America the Beautiful Quarters||America the Beautiful Quarters||2010–2021|
||30.61 mm||2.15 mm||11.34 g
|150 reeds||John F. Kennedy||Seal of the President of the United States surrounded by 50 stars||1971–1974, 1977–present5||limited6||half, half dollar, 50-cent piece|
|Independence Hall||(1975) 19765|
||38.1 mm||2.58 mm||22.68 g
|reeded||Dwight D. Eisenhower||Apollo 11 mission insignia||1971-1978||Obsolete, but still legal tender||large dollar, "silver" dollar, Ike dollar|
|Liberty Bell superimposed over the Moon||1975-1976|
|26.50 mm||2.00 mm||8.10 g
|reeded||Susan B. Anthony||Apollo 11 mission insignia||1979–1981, 19998||Obsolete, but still legal tender||SBA, Suzie B.|
|26.50 mm||2.00 mm||8.10 g
Cladding: 77% Cu,
Overall: 88.5% Cu,
|plain||Sacagawea||Bald eagle in flight||2000–2008||limited7||dollar coin, gold(en) dollar, Sacajawea|
|see article: Native American $1 Coin Act||incused inscriptions||Native American Themes||2009–present|
|see article: Presidential $1 Coin Program7||Each deceased president||Statue of Liberty||2007–2016||dollar coin, gold(en) dollar|
|These images are to scale at 2.5 pixels per millimeter. For table standards, see the coin specification table.|
- The mass and composition of the cent changed to the current copper plated zinc core in 1982. Both types were minted in 1982 with no distinguishing mark. Cents minted in 1943 were struck on planchets punched from zinc coated steel which left the resulting edges uncoated. This caused many of these coins to rust. These "steel pennies" are not likely to be found in circulation today, as they were later intentionally removed from circulation for recycling the metal. However, cents minted from 1944 to 1946 were made from a special salvaged WWII brass composition to replace the steel cents, but still save material for the war effort, and are more common in circulation than their 1943 counterparts.
- The wheat cent was mainstream and common during its time. Some dates are rare, but many can still be found in circulation. This is partially due to the fact that unlike the formerly silver denominations (dollar, half, quarter, dime), the composition of the pre-1982 cent, nearly pure copper, is not so much more valuable over face value for it to be hoarded to the extreme extant of the silver denominations.
- Nickels produced from mid-1942 through 1945 were manufactured from 56% copper, 35% silver and 9% manganese. This allowed the saved nickel metal to be shifted to industrial production of military supplies during World War II. Few of these are still found in circulation.
- Prior to 1965 and passage of the Coinage Act of 1965 the composition of the dime, quarter, half-dollar and dollar coins was 90% silver and 10% copper. The half-dollar continued to be minted in a 40% silver-clad composition between 1965 and 1970. Dimes and quarters from before 1965 and half-dollars from before 1971 are generally not in circulation due to being removed for their silver content. 
- In 1975 and 1976 bicentennial coinage was minted. Regardless of date of coining, each coin bears the dual date "1776-1976". The Quarter-Dollar, Half-Dollar and Dollar coins were issued in the copper 91.67% nickel 8.33% composition for general circulation and the Government issued 6-coin Proof Set. A special 3-coin set of 40% silver coins were also issued by the U.S. Mint in both Uncirculated and Proof.
- Use of the half-dollar is not as widespread as that of other coins in general circulation; most Americans use quarters, dimes, nickels and cents only, as these are the only coins most often found in general circulation. When found, many 50¢ and $1 coins are quickly hoarded, spent, or brought to banks.
- The Presidential Dollar series features portraits of all deceased U.S. Presidents with four coin designs issued each year in the order of the president's inauguration date. These coins began circulating on February 15, 2007. Starting 2012, these coins have only been minted in collectible sets because of a large stockpile.
- The Susan B. Anthony dollar coin was minted from 1979–1981 and 1999. The 1999 minting was in response to Treasury supplies of the dollar becoming depleted and the inability to accelerate the minting of the Sacagawea dollars by a year. 1981 Anthony dollars can sometimes be found in circulation from proof sets that were broken open, but these dollars were not minted with the intent that they circulate.
Non-circulating bullion coins have been produced each year since 1986. They can be found in silver, gold and also platinum since 1997. The face value of these coins is legal as tender, but does not actually reflect the value of the precious metal contained therein. On May 11, 2011, Utah became the first state to accept these coins as the value of the precious metal in common transactions. The Utah State Treasurer assigns a numerical precious metal value to these coins each week based on the spot metal prices.
|American Silver Eagle||40.6 mm||999 fine silver||$1||1.00 troy ounce (~31.10 grams)|
|American Gold Eagle||16.5 mm
|916 fine gold (22 karat)||$5
|0.10 ozt (~3.11 g)
0.25 ozt (~7.78 g)
0.50 ozt (~15.6 g)
1.00 ozt (~31.10 g)
|American Platinum Eagle||16.5 mm
|999.5 fine platinum||$10
|0.10 ozt (~3.11 g)
0.25 ozt (~7.78 g)
0.50 ozt (~15.56 g)
1.00 ozt (~31.10 g)
|American Buffalo||32.7 mm||999.9 fine gold (24 karat)||$50||1.00 ozt (~31.10 g)|
|America the Beautiful Silver Bullion Coins||76.2 mm||999 fine silver||25¢||5.00 ozt (~155.5 g)|
|Type||Total Weight||Diameter||Composition||Face Value||Precious Metal Content|
|Half Dollar||11.34 g||30.61 mm (1.205 in)||Cu 92%, Ni 8%||50¢||none|
|Dollar||26.73 g||38.1 mm (1.500 in)||Ag 90%, Cu 10%||$1||silver 24.057 g (~0.773 ozt)|
|Half Eagle||8.539 g||21.59 mm (0.850 in)||Au 90%, Ag 6%, Cu 4%||$5||gold 7.523 g (~0.2418 ozt)|
|Eagle||16.718 g||26.92 mm (1.060 in)||Au 90%, Ag 6%, Cu 4%||$10||gold 15.05 g (~0.484 ozt)|
|First Spouse Eagle Bullion||14.175 g||26.49 mm (1.043 in)||Au 99.99%||$10||gold 14.175 g (~0.456 ozt)|
- Half cent: 1⁄2¢, 1793–1857
- Fugio Cent: 1¢, 1787
- Two-cent piece: 2¢, 1864–1873
- Three-cent bronze: 3¢, 1863 (not circulated)
- Three-cent nickel: 3¢, 1865–1889
- Trime: 3¢, 1851–1873
- Half dime: 5¢, 1792–1873
- Twenty-cent piece: 20¢, 1875–1878
- Gold dollar: $1.00, 1849–1889
- Quarter eagle: $2.50, 1792–1929
- Three-dollar piece: $3.00, 1854–1889
- Stella: $4.00, 1879–1880 (not circulated)
- Half eagle: $5.00, 1795–1929 (some modern commemoratives are minted in this denomination)
- Eagle: $10.00, 1795–1933 (some modern commemoratives are minted in this denomination)
- Double eagle: $20.00, 1849–1933
- Half-union: $50.00, 1877 (pattern), 1915 (Panama–Pacific International Exposition coin)
Note: It is a common misconception that "eagle"-based nomenclature for gold U.S. coinage was merely slang. This is not the case. The "eagle," "half-eagle" and "quarter-eagle" were specifically given these names in the Coinage Act of 1792. Likewise, the double eagle was specifically created as such by name ("An Act to authorize the Coinage of Gold Dollars and Double Eagles", title and section 1, March 3, 1849).
Some modern commemorative coins have been minted in the silver dollar, half-eagle and eagle denominations.
See also US coin sizes, showing all major U.S. coin series and scaled images in a single chart.
Although the term mill (or mille) was defined in the 18th century as 1⁄1,000 of a dollar or 0.1¢, no coin smaller than 0.5¢ has ever been officially minted in the U.S. However, unofficial mill coins, also called "tenth cent" or "tax-help coins", made of diverse materials—plastic, wood, tin, and others—were produced as late as the 1960s by some states, localities, and private businesses for tax payments and to render change for small purchases.
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For historical reasons the size of the coins does not increase with their face value. Both the one-cent and the five-cent are larger than the ten-cent and the less common 50-cent coin is larger than the recent Sacagawea and Susan B. Anthony dollar coins, and the newer same-sized Presidential $1 Coins. The sizes of the dime, quarter, and half dollar are holdovers from before 1965 when they were made from 90% silver and 10% copper; their relative sizes thus depended upon the amount of silver needed to approximate the face value and allow reasonable seigniorage. The diameter of the Anthony, Sacagawea, and Presidential dollar coins was introduced in 1979 with the Anthony dollar not only as a concession to the vending machine industry which wanted a smaller dollar coin usable in their machines but also as an increase in the amount of seigniorage for the US Government (the difference between what a piece of money costs to produce and its face value or the profit margin).
The five coin types in circulation today have not had their sizes or denominations changed in well over a century, although their weights have been reduced due to the substitution of cheaper metals in their manufacture. Businesses usually have to keep adequate amounts in coin on hand, so as to be able to make change in fractional dollar amounts. Since they do not receive the coins they need through regular trade, there is often a one-way flow of coins from the banks to the retailers, who often have to pay fees for it.
Furthermore, apart from some dollar coins, U.S. coins do not indicate their value in numerals, but in English words, and the value descriptions do not follow a consistent pattern, referring to three different units, and expressions in fractions: "One Cent"; "Five Cents"; "One Dime"; "Quarter Dollar"; "Half Dollar"; "One Dollar"/"$1"; the values of the coins must therefore be learned.
- "United States Philadelphia Mint Facility". United States Mint. Retrieved 2011-05-25.
- "Denver Mint Facility". United States Mint. Retrieved 2011-05-25.
- "United States Mint at San Francisco". United States Mint. Retrieved 2011-05-25.
- "West Point Mint Facility". United States Mint. Retrieved 2011-05-25.
- "Coin Specifications". United States Mint. Retrieved 2011-05-27.
- Native American $1 Coin
- Christian Zappone (July 18, 2006). "Kill-the-penny bill introduced". CNN Money. Retrieved March 21, 2007.
- Weinberg, Ali (February 19, 2013). "Penny pinching: Can Obama manage elimination of one-cent coin?". NBC News. Retrieved February 20, 2013.