John Campbell, 4th Earl of Breadalbane (1796-1862), was a Scottish nobleman known for his role in the management of his family's estates in Scotland. He inherited the title in 1834 and was involved in various social and political issues of his time, including the Highland Clearances, which affected many tenants in the region. The Earl was also a prominent figure in the House of Lords, where he participated in debates and legislation. His contributions to Scottish society included support for agricultural improvements and local infrastructure, reflecting his commitment to the welfare of his tenants and the development of his lands.