Santa Rosa Valley is a rural unincorporated community, named after the eponymous valley in which it lies, located in Ventura County, California, United States. For statistical purposes, the United States Census Bureau has defined Santa Rosa Valley as a census-designated place (CDP). The census definition of the area may not precisely correspond to local understanding of the area with the same name. The 2020 United States census reported Santa Rosa Valley's population was 3,312. Santa Rosa Valley sits at an elevation of .

It lies within Ventura County north of Newbury Park, between Thousand Oaks and Camarillo. Norwegian Grade, which was constructed by the Norwegian Colony, connects Santa Rosa Valley to Thousand Oaks, while it may be reached from Santa Rosa Road in Camarillo.

The Santa Rosa Valley lies right north of the Conejo Valley and along the Arroyo Santa Rosa and Arroyo Conejo. While there has been significant suburban development, much of the area consists of agricultural lands and is home to a variety of wildlife such as bobcats, gray foxes, mule deer, coyotes, and more. The valley is likely the habitat for more than one mountain lion, and lions are relatively frequently observed here. Immediately to the south is the Conejo Canyons Open Space, with trails leading to the Arroyo Conejo Nature Preserve (La Branca) and Hill Canyon, and the community also borders Mount Clef Ridge and Wildwood Regional Park to the south.Murphy, Kelly (2012). Local Multi-Use Trails. Kelly Murphy. Pages 112-118. .Stone, Robert (2011). Day Hikes Around Ventura County: 116 Great Hikes. Pages 218-219. Day Hike Books. .

Santa Rosa Valley was home to a Chumash village in pre-colonial times, known as Šumpaši, which was located by Conejo Creek.Maxwell, Thomas J. (1982). The Temescals of Arroyo Conejo. California Lutheran College. Page 58.

Geography According to the United States Census Bureau, the CDP covers an area of 7.2 square miles (18.7 km), all of it land.

Demographics

Santa Rosa Valley first appeared as a census designated place in the 2010 U.S. census.

2020 census

As of the 2020 census, Santa Rosa Valley had a population of 3,312. The population density was . The age distribution was 18.5% under the age of 18, 7.1% aged 18 to 24, 16.1% aged 25 to 44, 33.1% aged 45 to 64, and 25.2% aged 65 or older. The median age was 52.1 years. For every 100 females, there were 99.0 males, and for every 100 females age 18 and over there were 95.6 males age 18 and over.

Of residents, 83.3% lived in urban areas and 16.7% lived in rural areas.

The whole population lived in households. There were 1,120 households, of which 27.1% had children under the age of 18 living in them. Of all households, 73.0% were married-couple households, 2.5% were cohabiting couple households, 11.0% were households with a male householder and no spouse or partner present, and 13.5% were households with a female householder and no spouse or partner present. About 12.2% of households were made up of individuals and 7.7% had someone living alone who was 65 years of age or older. The average household size was 2.96. There were 933 families (83.3% of all households).

There were 1,168 housing units at an average density of , of which 1,120 (95.9%) were occupied. Of these, 91.9% were owner-occupied and 8.1% were occupied by renters. Of all housing units, 4.1% were vacant. The homeowner vacancy rate was 0.6% and the rental vacancy rate was 0.0%.

+ Racial composition as of the 2020 census Race Number Percent White 2,548 76.9% Black or African American 21 0.6% American Indian and Alaska Native 10 0.3% Asian 205 6.2% Native Hawaiian and Other Pacific Islander 5 0.2% Some other race 134 4.0% Two or more races 389 11.7% Hispanic or Latino (of any race) 397 12.0% Education Almost all of it is in the Pleasant Valley Elementary School District and the Oxnard Union High School District, while a small portion is in the Moorpark Unified School District. - Text list

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