The Great Coinage Acts: How US Money Changed Over Time

Coinage Act of 1792: The Foundation

The Coinage Act of April 2, 1792, is the foundational legislation of American numismatics — the law that created the US Mint, defined the dollar, and established the principles that would guide American coinage for over two centuries. Drafted largely by Alexander Hamilton and shaped by Thomas Jefferson's advocacy for the decimal system, the Act represented one of the young republic's first assertions of economic sovereignty.

Key provisions of the 1792 Act:

• Established the US Mint in Philadelphia as a permanent federal institution.
• Defined the dollar as the basic monetary unit, based on the Spanish milled dollar (371.25 grains of pure silver or 24.75 grains of pure gold), creating a bimetallic standard.
• Authorized ten denominations: gold eagle ($10), half eagle ($5), quarter eagle ($2.50); silver dollar, half dollar, quarter, dime, half dime; copper cent and half cent.
• Prescribed the decimal system: 100 cents = 1 dollar. This was revolutionary — most of the world still used non-decimal monetary systems.
• Required coin designs to feature an image of Liberty, the word "LIBERTY," the national eagle, "UNITED STATES OF AMERICA," and the denomination.
• Set penalties for fraud: death for mint officers who debased the coinage; fines and imprisonment for counterfeiting.

The Act also allowed free coinage — any citizen could bring gold or silver to the Mint and have it coined at no charge (minus a small retention for assaying costs). This free coinage provision meant the Mint depended on private depositors for its bullion supply, a system that would shape mint operations for nearly a century.

Coinage Act of 1849: Gold Rush Responses

The California Gold Rush of 1849 flooded the country with gold, driving down gold's market price relative to silver and creating an urgent need for new denominations. Congress responded with the Coinage Act of March 3, 1849, which:

• Created the gold dollar — A tiny coin (13mm diameter) that became a popular denomination despite its small size. Gold dollars were produced from 1849 to 1889.
• Created the double eagle ($20 gold) — The largest regular-issue gold coin, containing nearly one full troy ounce of gold. The double eagle became the standard large gold coin and the foundation of international gold commerce. Augustus Saint-Gaudens' 1907 redesign is widely considered the most beautiful American coin ever produced.

Coinage Act of 1873: "The Crime of '73"

The Coinage Act of February 12, 1873, was one of the most consequential and controversial monetary laws in American history. Its primary effects:

• Demonetized silver — The Act effectively ended the bimetallic standard by removing the standard silver dollar from the list of authorized coins. Silver could no longer be freely deposited at the Mint for coining into dollars. This shifted the US to a de facto gold standard.
• Created the Trade dollar — A heavier silver dollar (420 grains vs. 412.5 for the standard dollar) designed specifically for trade with China and East Asia, where silver was the preferred medium of commerce.
• Abolished several denominations — The half dime, two-cent piece, three-cent silver, and silver three-cent piece were discontinued. The half dime was replaced by the copper-nickel five-cent piece (the modern nickel).

Silver mining interests, particularly in the American West, denounced the Act as the "Crime of '73" — arguing that demonetizing silver depressed its price, impoverished miners, and concentrated wealth among gold-holding Eastern bankers. The resulting political battle between gold-standard advocates and silver supporters (the "Free Silver" movement) dominated American politics for two decades and produced some of the era's most famous oratory, including William Jennings Bryan's legendary "Cross of Gold" speech at the 1896 Democratic convention.

Bland-Allison Act of 1878 and Sherman Silver Purchase Act of 1890

In response to political pressure from the silver movement, Congress passed two laws requiring the Treasury to purchase and coin silver:

• Bland-Allison Act (1878) — Required the Treasury to purchase $2–$4 million of silver monthly and coin it into standard silver dollars. This Act directly created the Morgan dollar (designed by George T. Morgan), which was produced in enormous quantities from 1878 to 1904 and again in 1921. Many Morgan dollars went directly into Treasury vaults, never entering circulation.
• Sherman Silver Purchase Act (1890) — Increased required silver purchases to 4.5 million ounces per month, the entire estimated US silver production. Repealed in 1893 during a severe economic depression.

Coinage Act of 1965: The End of Silver

By the early 1960s, rising silver prices made the silver content of US coins worth more than their face value. Citizens began hoarding silver coins, creating severe coin shortages. The Coinage Act of July 23, 1965, fundamentally changed American coinage:

• Eliminated silver from dimes and quarters — Replaced by copper-nickel clad composition (outer layers of 75% copper / 25% nickel bonded to a pure copper core).
• Reduced silver in half dollars — From 90% to 40% silver (clad composition). Silver was completely eliminated from half dollars in 1971.
• Removed mint marks — To discourage collector hoarding during the coin shortage, mint marks were removed from all coins from 1965 to 1967. This created the only period since 1838 when branch mint coins bore no identifying mark.

The 1965 Act marked the definitive end of precious metal circulating coinage in the United States. Every circulating US coin produced since 1971 has been struck in base metal — a fundamental change that generations of future collectors will study as a watershed moment in American monetary history.

Up Next

Iconic Coin Designers — the artists who created America's most beautiful coins.