Luke Fox (c. 1757 – c. 1819) was a judge of the Court of Common Pleas in Ireland in the early 19th century. In 1805, he was accused of judicial misconduct over his handling of a number of cases. Three petitions were presented to the House of Lords alleging that he had allowed his political preferences to sway his conduct as a judge. He was accused of trying to persuade a grand jury to find a verdict for political reasons, fining a High Sheriff for tardiness without good cause, insulting a trial jury, and defaming John Hamilton, 1st Marquess of Abercorn, who was described as "the last man whom one could attack with impunity".

The Prime Minister urged the Lords to abandon the case against Fox; they complied with his request, and Fox continued to serve for a further eleven years, altogether he had sought early retirement quite soon after his appointment.

He was initially, but wrongly suspected of being the author of the notoriously scurrilous "Juverna" letters, whose publication caused a major political scandal in 1803-5.