Erle-Drax-Grosvenor was returned to parliament as one of two representatives for Clitheroe in 1794, a seat he held until 1796.[2] In 1802 he was elected Member of Parliament for Chester (succeeding his younger brother Thomas), which constituency he represented until 1807.[3] He returned once again to the House of Commons in 1818 when he was returned for New Romney, a seat he held until his death the following year.[4] He was High Sheriff of Dorset for 1800–01.
Erle-Drax-Grosvenor died in February 1819, aged 56. He had married Frances, daughter and heiress of Edward Drax, of Charborough Park, Dorset, in 1788, and assumed the additional surnames of Erle-Drax on inheriting Charborough Park on the death of Edward Drax in 1791. They had a son and two daughters. His son, Richard, succeeded him as MP for New Romney.[1]