William Henry Barlow

William Henry Barlow FRS FRSE FICE MIMechE
Barlow by John Collier, 1880
Born	10 May 1812 (1812-05-10) Woolwich, Kent, U.K.
Died	12 November 1902(1902-11-12) (aged 90) Charlton, London, U.K.
Occupation	Engineer
Parent	Peter Barlow
Engineering career
Discipline	Civil
Institutions	Institution of Civil Engineers (president), Royal Society, Royal Society of Edinburgh
Projects	St Pancras railway station, Clifton Suspension Bridge, Tay Rail Bridge
Significant design	Barlow rail

William Henry Barlow FRS FRSE FICE MIMechE (10 May 1812 – 12 November 1902) was an English civil engineer of the 19th century, particularly associated with railway engineering projects. Barlow was involved in many engineering enterprises. He was engineer for the Midland Railway on its London extension and designed the company's London terminus at St Pancras.

With John Hawkshaw, he completed Isambard Kingdom Brunel's Clifton Suspension Bridge. Following the Tay Bridge disaster he sat on the commission which investigated the causes and designed the replacement Tay Bridge. Barlow was also an inventor and experimenter, patenting a design for a rail and carrying out investigations on the use and design of steel structures.