thumb|The sewers of Prague
thumb|The waterworks of Warsaw
thumb|Statue of William Lindley in Hamburg-Neustadt, 2008
William Lindley (7 September 1808 – 22 May 1900) was an English engineer who together with his sons designed water and sewerage systems for over 30 cities across Europe.
Life
Lindley was born in London. As a young engineer he worked together with Marc Isambard Brunel and Francis Giles. In 1834, he went to Germany as Giles' assistant to survey the railway route from Lübeck to Hamburg. A few years later, in 1838, he was commissioned to build the Hamburg-Bergedorf Railway Company