Richard Southwell Bourke, 6th Earl of Mayo (21 February, 1822 - 8 February, 1872), was a British statesman.

He was born in Dublin and was educated at Trinity College, Dublin. After travelling in Russia he entered parliament, and sat successively for Kildare, Coleraine and Cockermouth. He was Chief Secretary for Ireland in three administrations, in 1852, 1858 and 1866, and was appointed Viceroy of India in 1869. He consolidated the frontiers of India and reorganized the country's finances; he also did much to promote irrigation, railways, forests and other useful public works. While visiting the convict settlement at Port Blair in the Andaman Islands, for the purpose of inspection, he was assassinated by Sher Ali, a Punjabi Indian freedom fighter.

|- style="text-align: center;" | width="30%" |Preceded by:
Henry Arthur Herbert | width="40%" style="text-align: center;" |Chief Secretary for Ireland
1858–1859 | width="30%" |Succeeded by:
Edward Cardwell

|- style="text-align: center;" | width="30%" |Preceded by:
Chichester Parkinson-Fortescue | width="40%" style="text-align: center;" |Chief Secretary for Ireland
1866–1868 | width="30%" |Succeeded by:
John Wilson-Patten

|- style="text-align: center;" | width="30%" |Preceded by:
Sir John Lawrence | width="40%" style="text-align: center;" |Viceroy of India
1869–1872 | width="30%" |Succeeded by:
Sir John Strachey