Earl of Banbury was a title in the Peerage of England. It was created in 1626 for William Knollys. He had already been created Baron Knollys in 1603 and Viscount Wallingford in 1616, both in the Peerage of England. The titles are considered to have become extinct on his death in 1632. However, the extinction has been contested up to the present day. For more information on this, see the Knollys family. The family surname is pronounced "Noles".
In May 1804, King George III intended to confer the titles of Earl of Banbury, Viscount Wallingford and Baron Reading on the outgoing Prime Minister Henry Addington. However, Addington refused the honour and chose to remain in the Commons until 1805, when he joined Pitt's government as Lord President of the Council with the lesser title of Viscount Sidmouth.