Susanna Leveson-Gower, Marchioness of Stafford

Susanna Leveson-Gower, Marchioness of Stafford (/ˈluːsən ˈɡɔːr/ LOO-sən GOR; née Stewart; 1742 – 15 August 1805), styled Countess Gower from 1768 to 1786, was a British political hostess and aristocrat. A member of the Stewart and Leveson-Gower families, she was encouraged from a young age to pursue familial advancement through social connections and patronage.

After serving for a few years as a lady-in-waiting to Princess Augusta, in 1768 Susanna became the third wife of Granville Leveson-Gower, Earl Gower. She helped his political career and by 1788 was recognized as one of the most influential women in British politics. Well-connected, a review of her correspondence indicates that she was frequently contacted for assistance obtaining military appointments, placements, and promotions.