A Celtic society (sometimes Highland society or Gaelic society more specifically) is a type of society at the four ancient universities of Scotland, and sometimes more broadly, at a city level, which were founded between the late 18th and mid-19th centuries in the wake of the Celtic Revival and Romanticism, with the primary aim of supporting the practical and academic study of the Scottish Gaelic language and culture. The student societies are the oldest at their respective universities, and were instrumental in campaigning for the establishment of academic departments dedicated to Gaelic studies.
St Andrews University Celtic Society, founded 1796, was among the first of these organisations. In the 20th century, as the other ancient universities began offering Gaelic as an academic subject, students with an interest in Gaelic chose to attend these instead. Consequently, the society at St Andrews shifted its focus towards Scottish country dance, and is no longer related to the other student societies.