The '''Australian one dollar coin''' is the second-most-valuable circulation denomination coin of the [[Australian dollar]] after the [[Australian two-dollar coin|two-dollar coin]]; there are also non-circulating legal-tender coins of higher denominations (five-, ten-, two-hundred-dollar coins<ref name="200coin">{{cite web|url=http://www.australian-coins.com/collecting-coins/australian-200-dollar-coins/ |title=$200 Gold coin}}</ref> and the one-million-dollar coin<ref name="milcoin">{{cite web|url=http://www.smh.com.au/business/1-million-coin-minted-20111027-1mm8b.html |title=$1 million coin minted |publisher=smh.com.au |date=2011-10-28 |accessdate=2016-11-18}}</ref>).
It was first issued on 14 May 1984<ref name="ramint1">{{cite web|url=https://www.ramint.gov.au/one-dollar |title=One dollar |publisher=Royal Australian Mint |date=1984-05-14 |accessdate=2016-11-28}}</ref> to replace the [[Australian one-dollar note|one-dollar note]] which was then in circulation, although plans to introduce a dollar coin had existed since the mid-1970s.<ref name="ramint1" /> The first year of minting saw 186.3 million of the coins produced at the [[Royal Australian Mint]] in [[Canberra]].<ref name="ramint1"/>
