Hugh Iorys Hughes (16 April 1902 – 16 August 1977) was a Welsh civil engineer and keen yachtsman who submitted ideas to the War Office for the design of the Mulberry harbours used in Operation Overlord. Hughes was born in Bangor, where he attended Friars' School, and grew up in the Conwy area, becoming familiar with its waters. He studied engineering at the University of Sheffield. Afterwards he went to work for Owen Williams, a designer of concrete structures, specialising in bridges. On the outbreak of war, he was unable to join the armed services because he was now in a reserved occupation.