Rancho Tequepis was a 8,919-acre (36.09 km2) Mexican land grant in the upper Santa Ynez Valley of present-day Santa Barbara County, California. The grant extended along both sides of the Santa Ynez River at the mouth of Cachuma Creek east of present-day Santa Ynez and north/below San Marco Pass. Much of the grant is now under the waters of Lake Cachuma which was formed in 1953.