Duncan Dunbar (1764 – 1825) was a Scottish brewer and wine merchant.
Dunbar was born in Balnageith near Forres, in what was then Elginshire.[1] He settled in Limehouse, London in the 1790s, establishing his alcohol business at Dunbar wharf.
On the death of their father, Duncan and his brother John took on the running of the business. Duncan junior bought out his brother John. Then he expanded the business into shipping. He was extremely successful and when he died on 6 March 1862 at his home at Porchester Terrace, Paddington his fortune amounted to £1.5 million.