| Honorific Prefix: | The Right Honourable |
| The Earl Cawdor | |
| Honorific Suffix: | TD FSAScot FRGS |
| Office: | Member of the House of Lords Lord Temporal |
| Term Start: | 1914 |
| Term End: | 1970 |
| Predecessor: | The 4th Earl Cawdor |
| Successor: | The 6th Earl Cawdor |
| Birth Date: | 6 September 1932 |
| Death Date: | 20 June 1993 |
| Occupation: | landowner, military officer, politician |
| Relatives: | Clan Campbell of Cawdor |
| Children: |
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| Father: | Hugh Campbell, 4th Earl Cawdor |
| Mother: | Joan Thynne |
John Duncan Vaughan Campbell, 5th Earl Cawdor, TD FSAScot FRGS (17 May 1900 – 9 January 1970), styled Viscount Emlyn between 1911 and 1914, was a Scots-Welsh nobleman.
Campbell was the son of Hugh Campbell, 4th Earl Cawdor and Joan Emily Mary Thynne. He fought in the First World War, with the Royal Navy and was awarded the Territorial Decoration. He fought in World War II as a Lieutenant-Colonel and was mentioned in despatches. He was invested as a Fellow of the Royal Geographical Society, the Society of Antiquaries of Scotland and the Society of Antiquaries of London.
Lord Cawdor married, firstly, Wilma Mairi Vickers (1906–1982), daughter of Vincent Cartwright Vickers, on 15 May 1929. They had three children:
They were divorced in 1961.[5] He married, secondly, Elizabeth Topham Richardson, daughter of John Topham Richardson (1850–1934) of Harps Oak, Merstham, Surrey, and Katharine Rose Richardson, née Smyth (1863–1945), on 29 June 1961.