Thomas Vaux, 2nd Baron Vaux of Harrowden (25 April 1509 – October 1556), English poet, was the eldest son of Nicholas Vaux, 1st Baron Vaux and his second wife, Anne Green, daughter of Sir Thomas Green, Lord of Nortons Green, and Joan Fogge. He was educated at Cambridge University. His mother was the maternal aunt of queen consort Catherine Parr, while his wife, Elizabeth Cheney, was a first cousin of the sixth and final wife of King Henry VIII.
In 1527, he accompanied Cardinal Wolsey on his embassy to France. Vaux privately disapproved of King Henry VIII's divorce from his first wife, Catherine of Aragon. In 1531, he took his seat in the House of Lords. In 1532, he attended Henry VIII to Calais and Boulogne and was made Knight of the Bath at the coronation of Anne Boleyn. He was Lieutenant Governor of Jersey in 1536. Schism from Rome caused him to sell his offices; he did not attend Parliament between 1534 and 1554. Instead, Vaux retired to his country seat until the accession of Mary I, when he returned to London for her coronation. Vaux was the friend of other court poets such as Sir Thomas Wyatt and Henry Howard, Earl of Surrey.