| Honorific Prefix: | The Right Reverend |
| Vicar Apostolic of the Lowland District | |
| Church: | Roman Catholic Church |
| Term: | 1746–1766 |
| Predecessor: | James Gordon |
| Successor: | James Grant |
| Other Post: | Titular Bishop of Mosynopolis (1735-1766) |
| Ordination: | 19 April 1712 |
| Ordained By: | James Gordon |
| Consecration: | 13 November 1735 |
| Consecrated By: | James Gordon |
| Birth Place: | Fochabers, Scotland |
| Death Date: | 21 August 1766 (aged about 82) |
| Death Place: | Edinburgh, Midlothian, Scotland |
| Previous Post: | Coadjutor Vicar Apostolic of the Lowland District (1735–1746) |
Alexander Smith (– 21 August 1766) was a Roman Catholic bishop who served as the Vicar Apostolic of the Lowland District, Scotland.
Born in Fochabers, Moray in 1684, he was ordained a priest on 19 April 1712. He was appointed the Coadjutor Vicar Apostolic of the Lowland District and Titular Bishop of Mosynopolis by the Holy See on 19 September 1735. He was consecrated to the Episcopate in Edinburgh on 2 November 1735. The principal consecrator was Bishop James Gordon, and the principal co-consecrator was Bishop Hugh MacDonald. On the death of James Gordon on 18 February 1746, he automatically succeeded as the Vicar Apostolic of the Lowland District. He died in office on 21 August 1766, aged 73.[1]
. William Maziere Brady. The Episcopal Succession in England, Scotland and Ireland, A.D. 1400 to 1875 . 1876 . Tipografia Della Pace . Rome . 3 . 459–460.