John Gray (16 June 1817 – 14 January 1872) was a Roman Catholic bishop who served as the Vicar Apostolic of the Western District of Scotland.

He procured a site for a school on Greendyke Street, fronting Glasgow Green, which was opened in May 1856 and consisted of two large halls; the lower of which was for boys and the upper for girls.

[3] He was appointed the Coadjutor Vicar Apostolic of the Western District and Titular Bishop of Ipsus by the Holy See on 6 May 1862 upon the death of Alexander Smith, and was consecrated to the Episcopate at St Andrew's Cathedral, Glasgow on 19 October 1862.

[3] On the death of Bishop John Murdoch on 15 December 1865, he automatically succeeded as the Vicar Apostolic of the Western District.

[1][4] Instead, Bishop Gray was succeeded by Archbishop Charles Petre Eyre, who was appointed Apostolic Administrator of the Western District on 16 April 1869.