Charles Tennyson d'Eyncourt, born Charles Tennyson, was a British politician, landowner and Member of Parliament for Stamford from 1831 to 1832 and for Lambeth from 1832 to 1852. He is also known for his social pretensions and his graceless behaviour towards his nephew, the poet Alfred Lord Tennyson. He was educated at St John's College, Cambridge.

Stamford was a constituency in the county of Lincolnshire of the House of Commons for the Parliament of England to 1706 then of the Parliament of Great Britain from 1707 to 1800 and of the Parliament of the United Kingdom from 1801 to 1918. It was represented by two Members of Parliament until 1868 when this was reduced to one.