Saint Fergus (also Fergustian) (died c. 730 AD) was a bishop who worked in Scotland as a missionary.

In the Aberdeen Breviary he is called Fergustian and "he occupied himself in converting the barbarous people."

[2] Known in the Irish martyrologies as St. Fergus Cruithneach, or the Pict, the Breviary of Aberdeen states that he had been a bishop for many years in Ireland when he went on a mission to Alba with some chosen priests and other clerics.

[1] The church Fergus built at Glamis would have been in the Celtic "mud and wattle" style, not far from the present kirk.

He died about 730 and was buried at Glamis, Angus, where the recently restored St Fergus' Well can be visited.