Walter John Seton (29 December 1864 – 30 October 1912) was an English first-class cricketer, barrister and soldier. The son of Walter Seton Karr, he was born at Calcutta in British India in December 1864. He was educated at Eton College, before going up to New College, Oxford. After graduating from Oxford in 1886, he was commissioned as a second lieutenant in the London Scottish Regiment in December 1887. A student of the Inner Temple, he was called to the bar in 1889. He later made a single appearance in first-class cricket for Oxford University against Essex at Leyton in 1894, despite having graduated eight years previously. Batting twice in the match, he was dismissed for a single run in the Oxford first innings by Walter Mead, before ending their second innings unbeaten without scoring.