Barbara Herbert, Countess of Pembroke (c.1668 – 1 August 1721) was a British court official and noble, the second wife of Thomas Herbert, 8th Earl of Pembroke. The daughter of Sir Thomas Slingsby, 2nd Baronet, and his wife, Dorothy Cradock. Barbara had two brothers: (c.1660-1691), and (c.1668-1726) She married the Earl of Pembroke on 21 September 1708, in London. The earl and countess had one daughter, Lady Barbara Herbert (died 27 December 1752), who on 3 October 1730 married Edward Dudley North.