He was born in 1565 in Mid Calder, West Lothian, Scotland, the eldest son of John Spottiswood, minister of Calder and superintendent of Lothian. He was educated at the University of Glasgow, and succeeded his father in the parish of Calder in 1583. In 1601 he attended Ludowick, Duke of Lennox, as his chaplain, in an embassy to the court of France, returning in 1603. He followed James to England on his accession, but was the same year nominated to the see of Glasgow, his consecration in London, however, not taking place until October 1610. Spottiswoode had originally become prominent as an ardent supporter of the strict Presbyterian party, but gradually came to see the inconveniences of "parity of ministers", attributed little importance to the existing matters of dispute, and thought that the interests of both church and state were best secured by keeping on good terms with the king. He was therefore ready to co-operate with James in curtailing the powers of the Kirk which encroached on the royal authority, and in assimilating the Church of Scotland to that of England. On 30 May 1605 he became a member of the Scottish Privy Council. In 1608 he worked closely with George Home, Earl of Dunbar in appointing suitable ministers to vacant parishes in the Borders as part of James' programme for bringing peace to the region. In 1610 he presided as moderator over the assembly in which the supremacy of presbytery was abolished. That same year he was consecrated bishop on 21 October by the bishops of London, Ely, Rochester, and Worcester. In 1614, he was instrumental in the arrest and subsequent trial and condemnation to death of John Ogilvie. In 1615 he was made Archbishop of St Andrews and primate of Scotland, and in 1618 procured the sanction of the privy council to the Five Articles of Perth with their ratification by parliament in 1621. In 1633 he crowned Charles I at Holyrood. In 1635 he was appointed Lord Chancellor of Scotland, an office which he retained till 1638. John founded Dairsie Old Church, and re-built Dairsie Castle as a family home. The castle was rebuilt from a ruin in the 1990s, and his family crest is visible inside and outside the buildings. He was opposed to the new liturgy as inexpedient, but when he could not prevent its introduction he took part in enforcing it. He was a spectator of the riot of St Giles, Edinburgh, on 23 July 1637, endeavoured in vain to avoid disaster by concessions, and on the taking of the Covenant perceived that "now all that we have been doing these thirty years past is thrown down at once." He escaped to Newcastle, was deposed by the assembly on 4 December on a variety of ridiculous charges, and died in London on 26 November 1639, receiving burial in Westminster Abbey on 2 December 1639. Spottiswoode published in 1620 Refutatio libelli de regimine ecclesiae scoticanae, an answer to a tract of Calderwood, who replied in the Vindiciae subjoined to his Altare damascenum. The only other writing published during his lifetime was the sermon he preached at the Perth assembly. His most considerable work was The History of the Church and State of Scotland. It displays considerable research and sagacity, and even when dealing with contemporary events gives a favorable impression, upon the whole, of the author's candour and truth. The opposite side can be studied in Calderwood's History.
"Gladstanes was succeeded in the primacy by John Spotswoode, a shrewd and crafty politician, and the author of a History of the Church of Scotland, which, as has been well observed, might more properly be called "Calumnies against the Church of Scotland." This historian, as appears from his private correspondence, was engaged in all the Jesuitical plots of the government for overturning Presbytery, which he had sworn to support, and could hardly be expected to give a fair account of transactions in which his own credit was so deeply implicated, and for his share in which he was afterwards excommunicated by the Church which he had betrayed. His falsehoods and misrepresentations have been so completely exposed, that to appeal to him now as an authority on any point of history affecting the cause of Presbytery, may be set down at once as a mark of blindfolded prejudice."
John, a staunch loyalist, who joined James Graham, 1st Marquess of Montrose and was taken prisoner with him and executed immediately after him, on 21 May 1650.