Santa Ynez is located at. According to the United States Census Bureau, the CDP has a total area of, 99.86% of it land, and 0.14% of it covered by water. Santa Ynez is located about north of Santa Barbara, California, and is known for its world-class wineries.
At the 2010 census Santa Ynez had a population of 4,418. The population density was 859.0 people per square mile. The racial makeup of Santa Ynez was 3,797 White, 12 African American, 234 Native American, 51 Asian, 4 Pacific Islander, 147 from other races, and 173 from two or more races. Hispanic or Latino of any race were 639 people. The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized. There were 1,741 households, 524 had children under the age of 18 living in them, 1,052 were opposite-sex married couples living together, 137 had a female householder with no husband present, 81 had a male householder with no wife present. There were 82 unmarried opposite-sex partnerships, and 18 same-sex married couples or partnerships. 367 households were one person and 186 had someone living alone who was 65 or older. The average household size was 2.54. There were 1,270 families ; the average family size was 2.91. The age distribution was 916 people under the age of 18, 280 people aged 18 to 24, 785 people aged 25 to 44, 1,559 people aged 45 to 64, and 878 people who were 65 or older. The median age was 47.8 years. For every 100 females, there were 96.3 males. For every 100 females age 18 and over, there were 91.7 males. There were 1,886 housing units at an average density of, of which 1,327 were owner-occupied, and 414 were occupied by renters. The homeowner vacancy rate was 1.3%; the rental vacancy rate was 11.3%. 3,434 people lived in owner-occupied housing units and 984 people lived in rental housing units.
2000
At the 2000 census there were 4,584 people, 1,627 households, and 1,277 families in the CDP. The population density was 586.7 people per square mile. There were 1,670 housing units at an average density of. The racial makeup of the CDP was 91.84% White, 0.17% African American, 1.22% Native American, 1.29% Asian, 0.02% Pacific Islander, 3.08% from other races, and 2.38% from two or more races. Hispanic or Latino of any race were 9.21%. Of the 1,627 households 36.3% had children under the age of 18 living with them, 68.0% were married couples living together, 7.4% had a female householder with no husband present, and 21.5% were non-families. 15.5% of households were one person and 7.0% were one person aged 65 or older. The average household size was 2.78 and the average family size was 3.09. The age distribution was 26.2% under the age of 18, 4.7% from 18 to 24, 25.5% from 25 to 44, 28.8% from 45 to 64, and 14.9% 65 or older. The median age was 42 years. For every 100 females, there were 90.7 males. For every 100 females age 18 and over, there were 88.4 males. The median household income was $80,284 and the median family income was $84,467. Males had a median income of $56,286 versus $45,688 for females. The per capita income for the CDP was $33,811. About 3.0% of families and 5.5% of the population were below the poverty line, including 7.1% of those under age 18 and 2.4% of those age 65 or over. The Santa Ynez Band of Chumash Mission Indians, a federally recognizedChumash tribe is headquartered in Santa Ynez. They operate the local Chumash Casino Resort.
