Rancho Santa Rita was a 8,894-acre (35.99 km2) Mexican land grant in the Amador Valley and western Livermore Valley, which is in present day Alameda County, California.
It was given in 1839 by Governor Juan Alvarado to Jose Dolores Pacheco.[1]
The rancho included present day Pleasanton, Asco, and Dougherty.[2][3][4]