Sir Alexander Richardson Binnie (26 March 1839 – 18 May 1917) was a British civil engineer responsible for several major engineering projects, including several associated with crossings of the River Thames in London. In 1875, he returned to England as Chief Engineer for Waterworks for the City of Bradford, West Yorkshire where he was concerned with the repair and construction of reservoirs and large water supply projects, such as Upper Barden Reservoir. He was then offered the post of Chief Engineer for London County Council in 1890, a post he held until 1902.