 He inherited the Tredegar Estate from his father in 1720, and in 1722, entered the House of Commons, being returned for both Brecon and Monmouthshire and choosing to sit for the latter.He was also, like his father, appointed Lord Lieutenant of Brecknockshire and Lord Lieutenant and "custos" of Monmouthshire in 1720, and also became "custos" of Brecknockshire in 1723.Morgan was one of the Founder Knights of the Order of the Bath upon its revival in 1725.