Colin Campbell (1 November 1686 – 9 May 1757) was a Scottish merchant and entrepreneur who co-founded the Swedish East India Company and was Swedish King Fredrik I's first envoy to the Emperor of China.
He was born in June 1686 to John Campbell, a lawyer and prominent citizen of Edinburgh and his wife Elizabeth Campbell of Moy, Inverness-shire. They were related to the noble family of Clan Campbell of Cawdor, later prominent in the Peerage. Colin was the youngest of three brothers (following Archibald and Hugh) and all followed their father in becoming notaries, merchants and prominent citizens. Colin became a Burgess of Edinburgh in 1720, when the citation described him as "of London".
In 1723, he lost a great deal of money and was left burdened in debt following the spectacular investments and subsequent financial collapse known as the South Sea Bubble. He vowed to repay all his debts, and did so before he died, but meanwhile had to flee from his debtors to Ostend in Belgium. This was then part of the Austrian Netherlands, where Campbell helped the Austrians in their attempts to set up an Austrian rival to the British East India Company. He stayed there until 1730, mostly as a supercargo, accompanying ships and managing sales. The Austrian scheme was not a success, largely because of British opposition, so he moved to , in Sweden. The following year he moved to Gothenburg, Sweden's premier port, where other Scottish merchants had been long established.
In Gothenburg, he entered into partnership with wealthy and well-connected Swedes. Henric König (1686–1736) was an import/export broker from Stockholm, from a family of German Hanseatic merchants, though now resident in Sweden. His brother, Christian (1678–1762) was secretary to the Chancellery Cabinet and through him Henric had contact with the King Fredrik I. Köning had been developing an East Indian trading scheme, along with Niclas Sahlgren, a merchant who had worked with the Dutch East India Company, and who had already been involved in a possible Swedish West India project. Campbell approached Sahlgren who invited him to Sweden.