Luis María Peralta (1759 in Sonora, New Spain – August 26, 1851) was a Californio ranchero and soldier in the Spanish Army.
Peralta received Rancho San Antonio, one of the largest of the rancho grants in California, covering 44,800 acres (181 km2) that encompassed most of the East Bay region of the Bay Area in Northern California.
The Peralta family (the 17-year-old Luis, his father, mother and three siblings) was part of the group of settlers that arrived in Alta California with Juan Bautista de Anza on his 1776 expedition.
Surprising the Indians in their village, Peralta won a swift victory, which enhanced his reputation.
Then a sergeant, he was honored by appointment as comisionado in charge of Pueblo San José in 1807, the highest military and civilian official.