Sir (Owen) Watkin Williams-Wynn, 10th Baronet, KStJ, CBE, of Bodelwyddan in the County of Flint, and of Gray's Inn in the county of Middlesex (30 November 1904 – 13 May 1988), was a Welsh soldier and landowner.
He was Lord Lieutenant of Denbighshire from 1966 to 1974, then Lord Lieutenant of Clwyd from 1976 to 1979.