Thomas Smeton, Smeaton or Smieton (1536–1583) was a Scottish minister and Principal of Glasgow University.
He was born at Gask, near Perth, was educated at the school at Perth, and in 1553 incorporated a student in St. Salvator's College, St. Andrews. A promising scholar, he was made a regent of the college, and remained there until the reformers gained the ascendency. He was then ejected, and went to Paris. There he associated with many of the reformers, and enjoyed the friendship of Andrew Melville. Still a Catholic, he entered the Company of Jesus as a probationer, and proceeded to their college at Rome, visiting Geneva on his way. After continuing in Rome about a year and a half, he found himself suspect in Rome as a favourer of Protestant doctrine. He left for Paris, and shortly after proceeded to Clermont, in both places lecturing on the humanities. In Paris in 1571, Thomas Maitland, a younger brother of William Maitland of Lethington, persuaded Smeton to accompan