Alessandro, Principe Ruspoli (October 5, 1784 – October 31, 1842) was the 4th Prince of Cerveteri, 4th Marquis of Riano, 9th Count of Vignanello and Prince of the Holy Roman Empire.

He was the son of Francesco Ruspoli, 3rd Prince of Cerveteri and his second wife HSH Leopoldina Gräfin von Khevenhüller-Metsch.

He had for brothers, among others, Camillo Ruspoli, Duke of Sueca, and Bartolomeo Ruspoli and Khevenhüller-Metsch.

Alessandro is the ancestor of the Line I of the Princes Ruspoli.

He married in Vienna, June 4, 1805, Marianna Gräfin Esterházy de Galántha (Nagyszeben, January 23, 1786 – December 11, 1821), by whom he had eight children: