The twenty cent coin was first introduced with decimal currency on 14 February 1966. The original reverse design of a platypus remained unchanged until 1995. This denomination has since been used for commemorative designs.

All twenty cent coins in the first issue in 1966 were produced at the Royal Mint, London. The Royal Australian Mint did not commence twenty cent coin production until the next financial year. Quantities of twenty cents have also been struck by the Royal Mint, Llantrisant and the Royal Canadian Mint.

Nominal specifications

Composition: 75% Copper - 25% Nickel

Shape: Circular

Edge: Milled

Mass: 11.3 grams

Diameter: 28.65 millimetres

Mintage Figures

Reverse Design Design Details Year Mintage

(millions) Mint* 1966 - 1994

An impression of a platypus designed and sculpted by Stuart Devlin 1966 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1981 1981 1982 1983 1984 1985 30.0 28.2 83.8 40.5 16.5 23.7 8.9 16.6 23.4 33.5 53.3 59.8 41.3 37.4 22.3 84.4 65.5 50.0 50.0 76.6 55.1 27.8 2.7 RML RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RMLL RCM RAM RAM RAM RAM No twenty cent coins were produced in 1986 or 1987 1986 1987 - - - - 1988

An impression of a platypus designed and sculpted by Stuart Devlin 1988 0.2 RAM No twenty cent coins were produced in 1989 - 1993 1989 1990 1991 1992 1993 - - - - - - - - - - 1994

An impression of a platypus designed and sculpted by Stuart Devlin 1994 14.3 RAM Celebrating the 50th anniversary of the United Nations 1995 4.8 RAM 1996 - 2001

An impression of a platypus designed and sculpted by Stuart Devlin 1996 1997 1998 1999 2000 2001 20.6 16.7 28.8 64.2 35.6 82.0 RAM RAM RAM RAM RAM RAM Celebrating the life and achievements of Sir Donald Bradman 2001 10.0 RAM Centenary of Federation Student Design winner for the Australian Capital Territory, Stacy Jo-Ann Paine of Caroline Chisholm High School 2001 2.1 RAM Centenary of Federation Student Design winner for New South Wales, Joseph Neve of Bellingen High School 2001 3.2 RAM Centenary of Federation Student Design winner for Norfolk Island, Megan Cummings of Norfolk Island Central School 2001 2.2 RAM Centenary of Federation Student Design winner for Northern Territory, Lisa Brett of Leanyer School 2001 2.1 RAM Centenary of Federation Student Design winner for Queensland, Jenifer Gray of Ingham State High School 2001 2.3 RAM Centenary of Federation Student Design winner for South Australia, Lisa Murphy of Yankalilla Area School 2001 2.4 RAM Centenary of Federation Student Design winner for Tasmania, Abbey MacDonald of Launceston Church Grammar School 2001 2.2 RAM Centenary of Federation Student Design winners for Victoria, Ryan Douglas Ladd and Mark Aaron Kennedy of Lara Lake Primary School 2001 2.9 RAM Centenary of Federation Student Design winner for Western Australia, Janice Ng of Forrestfield Senior High School 2001 2.4 RAM An impression of a platypus designed and sculpted by Stuart Devlin 2002 27.2 RAM Commemorating Australia’s volunteers 2003 7.6 RAM An impression of a platypus designed and sculpted by Stuart Devlin 2004 2005 72.1 58.6 RAM RAM Commemorating the 60th anniversary of the end of World War 2. Inspired by a photograph in the Australian War Memorial collection of a soldier returning home to his family 2005 33.5 RAM An impression of a platypus designed and sculpted by Stuart Devlin 2006 2007 2008 2009 2010 102.3 42.7 132.9 43.6 59.9 RAM RAM RAM RAM RAM Commemorating the Centenary of Australian Taxation Office 2010 11.6 RAM Commemorating International Women’s Day 2011 6.8 RAM Commemorating the Royal Wedding of Prince William and Catherine Middleton 2011 10.1 RAM Commemorating International Year of Volunteers 2011 6.1 RAM An impression of a platypus designed and sculpted by Stuart Devlin 2011 2012 15.1 34.6 RAM RAM Commemorating the Centenary of Canberra 2013 6.2 RAM An impression of a platypus designed and sculpted by Stuart Devlin 2013 2014 2015 2016 43.9 55.91 24.4 34.4 RAM RAM RAM RAM 2016 obverse design to celebrate the 50th anniversary of decimal currency 2016 4.5 RAM An impression of a platypus designed and sculpted by Stuart Devlin 2017 2018 2019 29.8 22.1 8.5** RAM RAM RAM



Notes for using these tables:

These are final mintages where the numbers have been published in an Annual Report and all coins have been issued. Items marked not available will be updated when they pass the Annual Report and issue test.

*RAM = Royal Australian Mint; RCM = Royal Canadian Mint; RML = Royal Mint, London; RMLL=Royal Mint, Llantrisant

** Partial Numbers for 2019 - Total production to be confirmed, once the 2019-2020 Annual Report is released.