Duke of Arco
| Dukedom of Arco | |
|---|---|
| Creation date | 26 April 1715 |
| Created by | Philip V |
| Peerage | Peerage of Spain |
| First holder | Alonso Manrique de Lara y Silva, 1st Duke of Arco |
| Present holder | Mercedes Falcó y Anchorena |
Duke of Arco (Spanish: Duque del Arco) is a hereditary title in the peerage of Spain, accompanied by the dignity of Grandee and granted in 1715 by Philip V to Alonso Manrique de Lara, 4th Count of Montehermoso, knight of the Order of the Golden Fleece and his caballerizo mayor for two periods, 1721–1724 and 1724–1737.
The title makes reference to the small village of Arco in Cañaveral, province of Cáceres, where the grantee held a lordship.