Mervyn Edward Wingfield, 7th Viscount Powerscourt (13 October 1836 – 5 June 1904) was an Irish peer. He became Viscount Powerscourt in 1844 on the death of his father Richard Wingfield, 6th Viscount Powerscourt. Through this Wingfield line he was a maternal descendant of the Noble House of Stratford. His mother was Lady Elizabeth Frances Charlotte, daughter of Robert Jocelyn, 3rd Earl of Roden.
| Honorific Prefix: | The Right Honourable |
| Viscount Powerscourt | |
| Birth Name: | Mervyn Edward Wingfield |
| Birth Date: | 13 October 1836 |
| Death Date: | 5 June 1904 |
| Death Place: | London, England |
| Spouse: | Lady Julia Coke |
| Issue: | 5 children, including Mervyn Wingfield, 8th Viscount Powerscourt |
| Noble Family: | Wingfield family |
| Father: | Richard Wingfield, 6th Viscount Powerscourt |
| Mother: | Lady Elizabeth France Charlotte |
| Occupation: | Peer, Military Officer, Art Collector |
| Predecessor: | Richard Wingfield |
| Successor: | Mervyn Wingfield |
| Other Titles: | Baron Wingfield (UK) |
On 26 April 1864, Wingfield married Lady Julia Coke, the daughter of Thomas Coke, 2nd Earl of Leicester. They had five children:[1]
He was commissioned as a Lieutenant in the part-time Wicklow Militia on 26 November 1870, promoted to Captain on 31 March 1871, and retired on 12 October 1871.[2]
Powerscourt was appointed a Knight of the Order of St Patrick on 2 August 1871.[3] He was created Baron Powerscourt in the Peerage of the United Kingdom in 1885, enabling him to sit in the House of Lords.
He owned 53,000 acres with 40,000 of these in Wicklow and 11,000 in Wexford and the remainder in Dublin.[4]
Lord Powerscourt collected paintings as a hobby and published a catalog in 1903 called A description and history of Powerscourt.[5] He sometimes included details about his purchases in his list.