Thomas Louth, or de Luda (died after 1338) was an English-born judge who spent much of his career in Ireland. He was notable for his long and ultimately unsuccessful struggle with Elias de Asshebournham for the office of Lord Chief Justice of Ireland. He was a native of Louth, Lincolnshire, and was sometimes known by the Latin version of his name, Thomas de Luda. In 1324 he appears on a commission of oyer and terminer and in the same year he was appointed a judge of the Court of Common Pleas (Ireland) but did not take up the latter office.