Countess of Hertford

Countess of Hertford is a title given to the wife of the Earl of Hertford. Women who have held the title include:
 * Isabel Marshal (1200–1240)
 * Maud de Lacy, Countess of Hertford and Gloucester (1223-1289)
 * Lady Katherine Grey (1540-1568)
 * Frances Howard, Duchess of Richmond (1578-1639)
 * Frances Seymour, Duchess of Somerset (1699–1754)
 * Isabella Seymour-Conway, Countess of Hertford (1726-1782)