Sir John Lowther, 2nd Baronet, of Swillington

Sir John Henry Lowther, 2nd Baronet (23 March 1793 – 23 June 1868) was a Tory MP in the British Parliament. He was the eldest son of Sir John Lowther, 1st Baronet, whom he succeeded on 11 May 1844.

He represented Cockermouth in 1816–1826, Wigtown Burghs in 1826–1831, Cockermouth again in 1831–1832, and York in 1835–1847. He then served as High Sheriff of Yorkshire for 1852–53.

He died unmarried, and was succeeded by his brother Charles Hugh Lowther.