William Waterlow was a British politician and member of the Liberal Party. He served as a Member of Parliament (MP) for Islington South from 1880 to 1885. Waterlow was known for his advocacy of social reforms and his commitment to improving the living conditions of the working class. In addition to his political career, Waterlow was also a successful businessman and served as the chairman of the Waterlow and Sons printing company. His contributions to both politics and industry made him a notable figure in Victorian England, reflecting the interconnectedness of commerce and governance during that era.