Marquess de las Marismas del Guadalquivir

The marquessate of las Marismas del Guadalquivir is a Spanish noble title created on 20 May 1829 by Ferdinand VII of Spain for Alejandro María Aguado y Ramírez de Estenoz (Seville 1784 - Gijón 1842), an Army officer and merchant banker.

The title derives its territorial designation from the area in Andalucia known as the Guadalquivir Marshes.