Lady Mary Fox-Strangways, 1st Countess of Ilchester (1749-1805), was a prominent British noblewoman known for her marriage to Henry Fox-Strangways, 2nd Earl of Ilchester. Born into an aristocratic family, she played a significant role in the social and cultural life of her time, often hosting gatherings that included influential figures of the era. As the Countess of Ilchester, she held a title that reflected her family's status in the British peerage. Lady Mary was also involved in charitable activities, contributing to various causes and supporting the arts, which further solidified her legacy in British society.