Pedro de Roxas Acevedo (c. 1594–1670s) was a Spanish military officer, and politician, who served in Buenos Aires and Asunción holding honorary positions, including the post of Governor of the Río de la Plata and Paraguay, on an interim term between January 8, 1641, to July 17, 1641.

[2] He had arrived at the Río de la Plata from Cádiz in 1612.

After establishing himself in the city, he held the post of notary public of the Cabildo of Buenos Aires in 1620.

[4] In 1641, Roxas was appointed as lieutenant governor of Buenos Aires,[5] being designated that same year to occupy of interim form the governorship of the Río de la Plata.

[8] He and his family received very large land grants in Buenos Aires, being considered one of the richest men of his time.