Rancho San Pablo was a 17,939-acre (72.60 km2) land grant in present-day Contra Costa County, California given in 1823 by Governor Luís Antonio Argüello to Francisco María Castro (1775–1831), a former soldier at the San Francisco Presidio and one-time alcalde of the Pueblo of San José. The grant was reconfirmed by Governor José Figueroa in 1834 to the heirs of Francisco Castro, including Víctor Castro.[1] The San Pablo grant covered what is now Richmond, San Pablo, El Cerrito, and Kensington in western Contra Costa County.[2]