Cecily Neville, Duchess of Warwick, Countess of Worcester (c.1425 – 26 July 1450) was a daughter of Richard Neville, 5th Earl of Salisbury and Alice Montacute, 5th Countess of Salisbury. Her siblings included Richard Neville, 16th Earl of Warwick; John Neville, 1st Marquess of Montagu; George Neville, (Archbishop of York and Chancellor of England); Katherine Neville, Baroness Hastings; and Alice Neville, Baroness FitzHugh.