Rancho Yajome was a 6,654-acre (26.93 km2) Mexican land grant in present day Napa County, California given in 1841 by Governor Juan Alvarado to Damaso Rodríguez, a soldier who did not occupy the property. The rancho is east of the Napa River and north of Napa.
The one and a half leagues were granted to Damaso Antonio Rodríguez (1782 - 1847). Rodriguez was a corporal of the Monterey Company, and transferred to the Santa Barbara Company in 1818. From 1833 he was alferez of the San Francisco Company, and sometimes commander of the post. While officially being an invalido, he was at Sonoma from 1837 in the service of General Mariano Guadalupe Vallejo. Rodriguez was involved in the 1846 Battle of Olompali and died soon after. The property was not occupied and Salvador Vallejo, brother of General Vallejo, applied for the property.
With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored. As required by the Land Act of 1851, a claim for Rancho Yajome was filed with the Public Land Commission in 1852, and the grant was patented to Salvador Vallejo in 1864.
- Ogden Hoffman, 1862, Reports of Land Cases Determined in the United States District Court for the Northern District of California, Numa Hubert, San Francisco
- Diseño del Rancho Yajome
- Hoover, Mildred B.; Rensch, Hero; Rensch, Ethel; Abeloe, William N. (1966). Historic Spots in California. Stanford University Press. ISBN 978-0-8047-4482-9.
- United States. District Court (California : Northern District) Land Case 39 ND
- Report of the Surveyor General 1844 - 1886