Hugh Macmillan FRSE FSA (1833–1903) was a Scottish minister of the Free Church of Scotland who served as their Moderator of the General Assembly in 1897.

His most popular book Bible Teachings in Nature ran to 15 editions in both UK and USA and translated into several languages.

[1] He was born on 17 September 1833 in Aberfeldy the eldest of nine children of Margaret (née Macfarlane) and Alexander Macmillan, a merchant.

He began an arts degree then medicine at the University of Edinburgh, dropping out when he decided instead to train for the Free Church of Scotland, which had been created in 1843.

In 1872 he was elected a Fellow of the Royal Society of Edinburgh, his proposer being John Hutton Balfour.