Sierra Leone issued the first palladium coins in 1966. Tonga commenced issuing palladium coins a year later, in 1967, and those issues included the Tonga Palladium Hau. Since then a number of countries have issued palladium coins, including Canada, the Soviet Union, France, Palau, Portugal, Russia, China, Australia and Slovakia. Most of these have been special commemorative coins.
A bill authorizing the United States Mint to produce and distribute a one-troy-ounce palladium coin was passed into law on December 14, 2010. The American Palladium Eagle, with a face value of $25, was first issued in 2017.
Canadian Big & Little Bear Constellations and Palladium Maple Leaf
The Canadian Big & Little Bear Constellations are the lowest-mintage coins ever minted by the Royal Canadian Mint, totaling no more than 1200 coins. There are four versions corresponding to four seasons. Actual mintages are 297 springs, 296 summers, 296 autumns, and 293 winters.
The Royal Canadian Mint minted palladium maple leafs from 2005 to 2007, in 2009, and resumed minting in 2015. These coins are made of 99.95% pure palladium (.9995 quality), each one containing one troy ounce of pure palladium. They are legal tender in Canada. One of the sides bears a single maple leaf (one of the national symbols of Canada), and the other has the effigy of Queen Elizabeth II.
- "American Eagle Palladium Bullion Coin Act of 2010". Library of Congress. Archived from the original on 4 October 2014. Retrieved 18 July 2011.
- "American Eagle Palladium Bullion Coins". United States Mint. 20 September 2017.
- "2009 Canadian Maple Leaf Palladium Coins". Austin coin collecting society. Archived from the original on 12 March 2010. Retrieved 23 March 2020.
- Rene Frank: "Catalogue of Palladium Coins 2007", moneytrend, Vienna (Austria) 2006, ISBN 3-9501620-7-0
- René Frank: "Palladium Coin Catalog 2010", Battenberg/Gietl (Germany) 2010, ISBN 978-3-86646-830-6