John Gordon MacWilliam, M. Afr. is a British Roman Catholic bishop and former soldier. From 2017 to 2025, he was the Bishop of Laghouat in Algeria. From 1968 to 1984, he was an officer of the Queen's Regiment in the British Army. After leaving the military, he joined the White Fathers, making his vows in 1991 and being ordained priest in 1992. After studying in London and in Rome, he ministered in Algeria and in Tunisia. In 2015, he was appointed Superior Provincial of the White Fathers for North Africa.