Henry Thynn, 3rd Marquess of Bath (1823-1892), was a British nobleman known for his role in the House of Lords. He inherited the title from his father, Thomas Thynn, 2nd Marquess of Bath, and was involved in various social and political activities during the Victorian era. He was also a prominent landowner, managing the family estate at Longleat, which is famous for its Elizabethan mansion and gardens. The 3rd Marquess was known for his interest in art and culture, contributing to the preservation of his family's heritage and the estate's historical significance.