John Lyttelton, 4th Baron Lyttelton (1790-1876), was a British nobleman and politician. He succeeded his father, the 3rd Baron Lyttelton, in 1837. Known for his contributions to the House of Lords, he was involved in various political matters during his lifetime. In addition to his political career, Lord Lyttelton was a landowner and held significant estates in Worcestershire. He was also known for his interest in literature and the arts, contributing to the cultural life of his time. His legacy includes his descendants, who continued the Lyttelton family line.