Marquess of Urquijo (Spanish: Marqués de Urquijo) is a noble title in the peerage of Spain accompanied by the dignity of Grandee of Spain, bestowed on Estanislao de Urquijo y Landaluce by King Amadeo I on 13 May 1871.

[2][3] On 1 August 1980, the 5th Marchioness of Urquijo, María Lourdes de Urquijo and her husband, Manuel de la Sierra, were famously murdered in their Madrid home by their son in law, Rafael Escobedo.

The crime, which became one of the most followed on Spanish media, is considered one of the most prominent criminal acts of post-Francoist Spain.

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