Rancho Posolmi also known as Ranch Yñigo was a 1,696-acre (6.86 km2) Mexican land grant in present-day Santa Clara County, California given in 1844 by Governor Manuel Micheltorena to Lupe Yñigo. The name refers to Posolmi village of the Ohlone. The grant encompassed present-day Moffett Field in Sunnyvale.