| William Mullan | |
| Fullname: | William Joseph Mullan |
| Birth Date: | 30 March 1928 |
| Birth Place: | Dublin, Ireland |
| Death Place: | Edinburgh, Scotland |
| Years1: | 1962–1973 |
| League1: | Scottish Division One |
| Role1: | Referee |
| Internationalyears1: | 1965–1973 |
| Confederation1: | FIFA listed |
| Internationalrole1: | Referee |
William Joseph Mullan (30 March 1928 – 13 November 2018) was a Scottish football referee.
In 1962, Mullan became a referee in the Scottish Division One. Three years later, he was appointed as a FIFA referee.
In 1972, Mullan was selected as a referee for UEFA Euro 1972, where he officiated a semi-final match between Belgium and West Germany.[1]
Later that year, Mullan was selected as a referee for the Summer Olympics in West Germany, where he officiated two matches, both in Munchen: Hungary - Brazil 2-2 (29 August) and F.R. Germany - German Democratic Republic 2-3 (8 September).
In 1973, Mullan retired from refereeing.
Mullan died on 13 November 2018 in Edinburgh, Scotland at the age of 90.[2]