Auckland was returned to Parliament for Woodstock in 1810 (succeeding his elder brother, William), a seat he held until 1812, and again between 1813 and 1814. The latter year he succeeded his father in the barony and took his seat in the House of Lords, supporting the reform party. In 1830 he became President of the Board of Trade and Master of the Mint under Lord Grey.
He was First Lord of the Admiralty under Grey and then Lord Melbourne in 1834 and again under Melbourne in 1835. He gave a commission to William Hobson to sail for the East Indies, which Hobson ultimately rewarded in the naming of his new town and future New Zealand capital city of Auckland in 1840.[2] Mount Eden in Auckland, the town of Eden, New South Wales and Auckland County, New South Wales were also named after him.