Campbell Drummond Riddell (9 January 1796 – 1858) was an Australian colonial public servant who served as the first Colonial Treasurer of New South Wales.
He was the grandson of Sir James Riddell Bt who was created first baronet, of Ardnamurchan, Argyllshire, Scotland.
[1] As treasurer, Riddell was appointed a member of the Executive Council on 25 June 1831.
[3] Riddell was retired as treasurer under the provisions of the new constitution with the introduction of responsible government in 1856 and was replaced by Thomas Holt.
[4] He traveled to England and his seat was vacated by his absence on 8 December 1858.