William Somerset, 3rd Earl of Worcester, KG (c. 1526/1527 – 21 February 1589) was an English courtier, nobleman, and politician.

He was the eldest son of Henry Somerset, 2nd Earl of Worcester and his second wife Elizabeth Browne.

[2] They were parents to three children: William Somerset re-married (2nd) before 1567 Theophila Newton, daughter of John Newton (otherwise Cradock), Knt., of East Harptree, Somerset, by Margaret, daughter of Anthony Poyntz, Knt.

A portrait of Countess Theophila by an unknown artist of that date is mentioned by Ashelford, Visual History of Costume (1983): 72.

William Somerset died at his house Hackney on 21 February 1589 and was buried in the Church of St Cadoc, Raglan, Monmouthshire.