William Dillwyn Sims (7 July 1825, in Westminster – 7 March 1895, in Ipswich) was an English industrialist and artist based in Ipswich. In 1851 he joined the company Ransomes and May, in which his uncle Charles May was a partner. Charles left in 1852 and the company became Ransomes and Sims. Sims remained involved in the company as it evolved into Ransomes, Sims & Jefferies.[1]