Thomas Buchanan (c. 1520–1599) was a Church of Scotland minister who served as Moderator of the General Assembly in 1588.
His paternal uncle was the senior Scottish churchman and historian, George Buchanan.
He probably spent many years as a teacher before becoming joint Rector of the High School in Edinburgh in February 1569.
[1] At this time the school was housed in St Mary's in the Fields on the outskirts of the town.
[2] In March 1589 the Privy Council made him Commissioner for the Preservation of the True Religion in Fife.