Agustín de Ahumada y Villalón, 2nd Marquess of Amarillas (18 September 1700 – 5 February 1760) was a Spanish military officer and Viceroy of New Spain from 1755 to 1760.

The Marqués de las Amarillas had a distinguished military career and gained renown in the wars in Italy, where he rose to the rank of lieutenant colonel in the Royal Guards.

He tried to suppress the irregularities of priests in Puebla (1756), where they were involved with the manufacture of aguardiente, gambling houses, and the selling of holy orders.

He intervened in the lawsuits involving the newly discovered deposits of silver in Nuevo León, trying to get the parties to settle.

The French were also trying to establish posts on the coast of Texas, and the British still threatened Spanish shipping and coastal settlements in the Caribbean.

On 10 August 1759 King Ferdinand VI died, after long illness due to his wife's death one year before; he was succeeded by Charles III.