Diego Dávila Mesía y Guzmán, 3rd Marquess of Leganés

Diego Dávila Mesía y Guzmán, 3rd Marquess of Leganés (around 1648 – 1711) was a Spanish noble and politician.

He was the son of Gaspar Felípez de Guzmán y Spinola, second marquess of Leganés and grandson of Diego Felipez de Guzmán, 1st Marquess of Leganés.

Between 1691 and 1698, he was Governor of the Duchy of Milan, in the midst of the Nine Years' War with France.

During the War of Spanish Succession, he switched sides from the Bourbon to the Habsburg party in 1705.

After his death in 1711, his titles went to Antonio Gaspar de Moscoso Osorio y Aragón.