Grant was the son of
Sir Ludovick Grant, 7th Baronet, and Lady Margaret Ogilvy, daughter of
James Ogilvy, 2nd Earl of Seafield. Born at
Cullen House, Moray, Scotland, he was educated at
Westminster School and
Christ's College, Cambridge. Grant succeeded his father as
Member of Parliament for
Elginshire in 1761, a seat he held until 1768. In 1773 Grant succeeded his father as eighth Baronet of Colquhoun. In 1783 he was a co-founder of the
Royal Society of Edinburgh and served as its first Physical President. From 1790 to 1795 he was MP for
Banffshire. He also served as
Lord Lieutenant of Inverness-shire. He was colonel of a
fencible regiment, the Grant Fencible Regiment raised in 1793. He died at the family seat of
Castle Grant in February 1811, aged 72, and was succeeded by his son
Ludovick Alexander Grant, who later that year succeeded his second cousin as fifth Earl of Seafield. ==Family==