John Porterfield (fl. 1571–1571x3) was a Scottish prelate in the sixteenth-century. A mysterious figure, he emerges in 1571 as the successor to James Beaton II as Archbishop of Glasgow. He was described by Robert Keith as "a kind of titular bishop", propped up by the establishment for nominal purposes during a period of disorder. Porterfield probably held on to the archbishopric into 1572, but he disappeared from the records thereafter. In late 1573, James Boyd became new Archbishop of Glasgow. Porterfield is possibly the John Porterfield, minister of Ayr, who died in 1604.
- Keith, Historical Catalogue, p. 260.
- Watt & Murray, Fasti Ecclesiae, p. 195.
- MacDonald, "Welsh, John".
- Keith, Robert (1824), An Historical Catalogue of the Scottish Bishops: Down to the Year 1688 (New ed.), London: Printed for Bell & Bradfute
- MacDonald, Alan R. "Welsh, John (1568/9–1622)", Oxford Dictionary of National Biography, Oxford University Press, 2004 , accessed 3 April 2008
- Watt, D. E. R.; Murray, A. L., eds. (2003), Fasti Ecclesiae Scoticanae Medii Aevi ad annum 1638, The Scottish Record Society, New Series, Volume 25 (Revised ed.), Edinburgh: The Scottish Record Society, ISBN 0-902054-19-8, ISSN 0143-9448
| Archbishop of Glasgow
1571–1571 x 1573