Innes’s father was a leading figure in the Reformed Presbytery who, on the breach of 1753, styled himself ‘moderator of the Reformed Session’ and set up a church for a dissentient congregation in Glasgow. He died in 1765, aged 38.
Innes’s career after leaving university is obscure, though he joined the Whig Club on 7 Mar. 1797. He was described in 1809 as ‘a mercantile man in London’,
At the general election of 1812 Innes made way for Seaforth’s son in the county and was himself returned, after another contest, for Tain Burghs, where Seaforth co-operated with the Sutherland interest. He retained the seat for 18 years. On 18 Nov. 1812 George Rose, reviewing an analysis of Members’ political affiliations, remarked of Innes: ‘marked pro, was invariably hostile; there may have been a late explanation’.
In 1818, Innes obtained the baronetcy which he had been pursuing for at least two years, but his applications to be appointed a commissioner of the Caledonian canal and secretary to the order of the Thistle were unsuccessful.
