Baron Victor de Tornaco (French pronunciation: [viktɔʁ də tɔʁnako]; 5 July 1805 – 26 September 1875) was a Luxembourgish politician.

An Orangist, he was the fourth prime minister of Luxembourg, serving for seven years, from 26 September 1860 until 3 December 1867.

In the years after the Belgian Revolution of 1830 he supported William I, King of the Netherlands and Grand-Duke of Luxembourg.

On 11 May 1867 he and Emmanuel Servais signed the Second Treaty of London, which had far-reaching consequences for Luxembourg.

He died on 28 September 1875 at the castle of Voordt in the Belgian province of Limburg;[1] he was buried in the family tomb in Sanem.