Charles Lennox, 4th Duke of Richmond (1764-1819), was a British nobleman and politician. He was born into the House of Lennox and became the Duke in 1819 after the death of his father. Richmond served as a Member of Parliament and held various political positions, including Lord Lieutenant of Sussex. In addition to his political career, the Duke was known for his interest in agriculture and land management. He was a prominent figure in the development of the Brighton area and contributed to the improvement of local infrastructure. His legacy includes advancements in farming techniques and the promotion of rural development.