Samuel Clegg (2 April 1814 – 22 July 1856) was a British civil engineer.
He was employed as an assistant engineer on the Greenwich, Great Western, and Eastern Counties (afterwards the Great Eastern Railway) lines, and as resident engineer on the Southampton and Dorchester Railway in 1844.
In 1836, he had made a trigonometrical survey of part of the Algarve Region in Portugal.
Cleg died in Putney, Surrey, 25 July 1856 at age 42.
At the time of his death, Clegg was devising a plan for removing all the gas manufactories in London to a location on the Essex shore.