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 born in Woolwich, the son of mathematician and physist Professor Peter Barlow, who taught at the Royal Military Academy.

From the mid 1840s until 1857, Barlow was chief engineer for the Midland Railway, after which he set up his on consultancy in London. Between 1862 and 1869 he was the consultant engineer on the Midland Railway's extension from Bedford to London, designing St Pancras station and the 240-foot (73 m) wide cast iron and glass train shed roof over the platforms, the widest unsupported arch in the world at the time.

Barlow was also engineer on the completion of Brunel's Clifton Suspension Bridge in Bristol and sat on the committee which investigated the causes of the Tay Bridge disaster in 1879. He designed the replacement Tay Bridge completed in 1887. In 1880, he was President of the Institution of Civil Engineers. (Full article...)