William Francis Newton Dunn, (born 3 October 1941), is a British politician, and since 2019 a Liberal Democrat Member of the European Parliament for the East Midlands.Newton Dunn first represented Lincolnshire as MEP from 1979 to 1994 and for the East Midlands from 1999 to 2014.
He resigned from the Conservative Party in 2000 in protest of its euroscepticism.