Francis Cornwallis (c. 1692–1728) of Abermarlais, was a Welsh Tory politician who sat in the House of Commons from 1722 to 1728.
Cornwallis was the only son of Thomas Cornwallis of Abermarlais, Carmarthenshire, and his wife Emma Charlton, daughter of Sir Job Charlton, 1st Baronet, MP of Ludford, Herefordshire and his second wife Letitia Waring.
[3] Cornwallis stood for Cardiganshire at the 1722 general election at the suggestion of Lewis Pryse and William Powell of Nanteos, joint leaders of the Cardiganshire Tories, and he was returned unopposed as Member of Parliament for the seat.
[4] Another sister Eleanor married the Irish politician and landowner Sir Robert Maude, 1st Baronet.
Cornwallis was described in his obituary as 'hospitable, obliging and beneficent; a lover of virtue without ostentation, and of mirth without vice'.