Thomas Edward Youd Seddon (2 July 1884 – 22 January 1972) was a New Zealand politician of the Liberal Party, and a lawyer in Greymouth.

He was the son of New Zealand's longest-serving Prime Minister Richard Seddon, and succeeded his father as MP for Westland following his death in 1906.

[1] He graduated in law, and joined the practice of John Findlay and Frederick George Dalziell,[1] and then became a barrister and solicitor in Greymouth.

[2] He married Beatrice Ann Wood on 15 March 1922 at St Mary's Church in the Christchurch suburb of Merivale.

[3] He inherited the Westland electorate on the sudden death of his father Richard Seddon in the 1906 by-election after he had just turned 22.