Ivor Guest, 3rd Viscount Wimborne

Ivor Fox-Strangways Guest, 3rd Viscount Wimborne (2 December 1939 – 17 December 1993) was a British peer.

Ivor Fox-Strangways Guest was born on 2 December 1939. He was the son of Ivor Grosvenor Guest, 2nd Viscount Wimborne (1903–1967), and Mabel Edith Fox-Strangways, who married in 1938. William Walton composed "Set me as a seal upon thine heart" for his parent's wedding.His maternal grandfather was Giles Fox-Strangways, 6th Earl of Ilchester (1874–1959). His paternal grandfather was Ivor Guest, 1st Viscount Wimborne (1873–1939), who was a British politician, and one of the last Lords Lieutenant of Ireland, serving in that position at the time of the Easter Rising in 1916. He was educated at Eton College, like his father.

He was married twice. The first was on 20 December 1966, when he married Victoria Ann Vigors. Together they had:

• Ivor Mervyn Vigors Guest, 4th Viscount Wimborne (born 1968), who married Ieva Imsa.

He later married Venetia Margaret Barker (nee Quarry), who was the sister of Miranda Macmillan, Countess of Stockton (born 1947). Together, they had:

• Ilona Charlotte Guest (born 1985), who married Oliver Hilton-Johnson in 2012.

His widow, now Dowager Viscountess Wimborne, lives at Fontaine-l'Abbé, France.