John MacDonald (2 July 1818 – 4 February 1889) was a Scottish clergyman who served as the Roman Catholic Bishop of Aberdeen from 1878 to 1889.

[1] He was appointed the Coadjutor Vicar Apostolic of the Northern District and Titular Bishop of Nicopolis ad Iaterum by the Holy See on 11 December 1868.

On the death of Bishop James Kyle on 23 February 1869, MacDonald automatically succeeded as the Vicar Apostolic of the Northern District.

He was consecrated to the Episcopate at the Church of St Mary of the Assumption (now Cathedral) in Aberdeen on 24 February 1869.

The Northern District was elevated to the Diocese of Aberdeen, with MacDonald becoming its first Roman Catholic bishop since the Scottish Reformation.