William Lewis Hughes, 1st Baron Dinorben (10 November 1767 – 10 February 1852), was a British copper mine owner, philanthropist and Whig politician. Hughes was the son of Reverend Edward Hughes, of Kinmel Hall, Denbighshire, and Mary, daughter of Robert Lewis, Rector of Trefdraeth. Mary had inherited the Llysdulas estate on Anglesey from her uncle, including Parys Mountain, which later became the largest copper mine in Europe and gained the Hughes family great wealth. The Kinmel estate in Denbighshire was acquired by Reverend Edward Hughes in 1786.