Andrew Mitchell Thomson (1779–1831) was a minister of the Church of Scotland, known as an evangelical activist and political reformer. When the Edinburgh town council presented Thomson to Greyfriars, there was strong opposition; but he became one of the influential Edinburgh preachers. He promoted singing at his church, and an improved psalmody in Scottish church worship. He issued a new set of tunes, some of which he composed himself, "Redemption" and "St. George's, Edinburgh" being among them.
In the General Assembly he identified himself with the reformers, and took part in the debates against pluralities in livings and the abuses of lay patronage. Like Thomas Chalmers, his ecclesiastical successor, he was interested in social questions, and founded in Edinburgh a weekday school, known as "Dr. Andrew Thomson's". He also took a prominent part in the agitation against slavery in the British colonies, advocating immediate and not gradual abolition.
He died suddenly in the street, when returning from a meeting of presbytery to his home on February 9, 1831. Thomas Chalmers preached one of his funeral sermons, and he was buried in the Dean Cemetery.
