Earl of Sefton was a title in the Peerage of Ireland created in 1771 for the 8th Viscount Molyneux. The Earls of Sefton held the subsidiary titles Viscount Molyneux, of Maryborough in the Queen's County, in the Peerage of Ireland, and Baron Sefton, of Croxteth in the County Palatine of Lancaster, in the Peerage of the United Kingdom.

Abbeystead House is a large country house to the east of the village of Abbeystead, Lancashire, England, some 12 km south-east of Lancaster. It is recorded in the National Heritage List for England as a designated Grade II listed building.