John Campbell, 2nd Marquess of Breadalbane, KT, PC, FRS, FSA (26 October 1796 – 8 November 1862), styled Lord Glenorchy until 1831 and as Earl of Ormelie from 1831 to 1834, was a Scottish nobleman and Liberal politician.

[10] The following year he was appointed Lord Lieutenant of Argyllshire (and Colonel of the Argyll and Bute Militia),[11] a post he held until his death.

[13] Breadalbane was also Rector of the University of Glasgow between 1840 and 1842[13] and of Marischal College, Aberdeen, between 1843 and 1845, President of the Society of Antiquaries between 1844 and 1862 and Governor of the Bank of Scotland between 1861 and 1862.

He was succeeded in the lordship of Glenorchy, viscountcy of Tay and Paintland and earldom of Breadalbane and Holland by his distant relative and namesake, John Campbell.

Breadalbane's and Mary's father the 1st Marquess was a trustee of a marriage settlement made for the union at the time of the wedding.

The claim was denied, as the ownership was determined to be part of the marriage settlement, but a £6,630 payment was awarded to the 1st Marquess of Breadalbane and Hon.