Hermann Jung (1830, St. Imier – 3.9.1901, London[1]) was a Swiss watchmaker who was active as a socialist in the International Workingmen's Association IWA.[2] Jung participated in the revolution of 1848/49 in Germany and then emigrated to London.[2] Here he became involved with the IWA. He was corresponding secretary for Switzerland in 1864–1872. He presided over the congresses of the IWA held in Geneva, Brussels, Basle and London.[2] He was a member of the British Federal Council.[2] Originally he followed of Marx, but after 1872 he joined the British Federal Council and the leaders of the British trade unions in opposing centralisation.[2] He was not involved in the labour movement after 1877.[2]