Los Olivos is an unincorporated community in the Santa Ynez Valley of Santa Barbara County, California, United States. Tourism is popular in this rural area which is an agricultural region with an emphasis on wine grapes. For statistical purposes, the United States Census Bureau has defined Los Olivos as a census-designated place (CDP). The population was 1,132 at the 2010 census. The ZIP Code is 93441, and the community is within the area code 805.

The Santa Ynez Valley is located in Santa Barbara County, California, between the Santa Ynez Mountains to the south and the San Rafael Mountains to the north. The Santa Ynez River flows through the valley from east to west. The Santa Ynez Valley is separated from the Los Alamos Valley, to the northwest, by the Purisima Hills, and from the Santa Maria Valley by the Solomon Hills. The Santa Rita Hills separate the Santa Ynez Valley from the Santa Rita and Lompoc Valleys to the west.