Marquess of Castelldosrius

Marquessate of Castelldosrius
Creation date6 April 1696
Created byCharles II
PeeragePeerage of Spain
First holderManuel de Oms y Santa Pau
Present holderÁgatha Ruiz de la Prada y Sentmenat
Heir apparentTristán Jerónimo Ramírez Ruiz de la Prada
Subsidiary titlesBaron of Santa Pau

Marquess of Castelldosrius (Spanish: Marqués de Castelldosríus) is a hereditary title in the Peerage of Spain, accompanied by the dignity Grandee and granted on 6 April 1696 by Charles II to Manuel de Oms y Santa Pau, knight of the Order of Malta, governor of Tarragona, viceroy and captain general of Mallorca, of Peru, of Tierra Firme and of Chile. The grandeeship was merged into the marquessate on 9 July 1701 by Philip V, later confirmed on 1 May 1703.

The title is currently held by Ágatha Ruiz de la Prada y Sentmenat, who also holds the title of Baroness of Santa Pau.