Wyndham Lewis (7 October 1780 – 14 March 1838) was a British politician and a close associate of Benjamin Disraeli.
Lewis was the son of Reverend Wyndham Lewis, of Tongwynlais, Glamorganshire. He sat as Member of Parliament for Cardiff from 1820 to 1826, for Aldeburgh from 1827 to 1829 and for Maidstone from 1835 to 1838.
Lewis married Mary Anne, daughter of John Evans, in 1816. They had no children. He died in March 1838, in London's Mayfair, aged 57. His widow married Benjamin Disraeli in 1839 and was created Viscountess Beaconsfield in 1868.