Background
Sefton was the eldest son of William Molyneux, 2nd Earl of Sefton, and the Honorary
Sefton was the eldest son of William Molyneux, 2nd Earl of Sefton, and the Honorary
Maria Margaret, daughter of William Craven, 6th Baron Craven. Sefton was returned to Parliament for Lancashire South in 1832, a seat he held until 1835. In 1838 he succeeded his father in the earldom and took his seat in the House of Lords.
Between 1851 and 1855 he served as Lord Lieutenant of Lancashire.
Lord Sefton married Mary Augusta, daughter of Robert Gregg-Hopwood, in 1834. They had several children.
The family seats were: Croxteth Hall, Lancashire. Stoke Farm, Berkshire; Sefton House, Belgrave Square, London.
11th United Kingdom Parliament.