Arthur Henry John Walsh, 3rd Baron Ormathwaite, GCVO (10 April 1859 – 13 March 1937) was a British Army officer, politician, peer and courtier.
Walsh was the eldest son of the 2nd Baron Ormathwaite and his wife, Katherine, a daughter of the 7th Duke of Beaufort.
In 1885, Walsh entered Parliament as Conservative MP for Radnorshire and held the seat until his defeat by Liberal Francis Edwards in 1892.
In 1897, he was briefly Comptroller of the Household to The Duchess of Teck before her death that year and he carried her coronet at her funeral.
He served as a Gentleman Usher (1902–1905)[1] and Groom-in-Waiting (1905–1907) to King Edward VII and was Master of the Ceremonies from 1907 to 1920 and Lord Lieutenant of Radnorshire from 1917 to 1921.