At the 2010 census Tamalpais-Homestead Valley had a population of 10,735. The population density was 2,307.6 people per square mile. The racial makeup of Tamalpais-Homestead Valley was 9,449 White, 91 African American, 24 Native American, 592 Asian, 28 Pacific Islander, 121 from other races, and 430 from two or more races. Hispanic or Latino people of any race were 499 people. The census reported that 99.9% of the population lived in households and 0.1% lived in non-institutionalized group quarters. There were 4,447 households, 1,516 had children under the age of 18 living in them, 2,458 were opposite-sex married couples living together, 312 had a female householder with no husband present, 149 had a male householder with no wife present. There were 234 unmarried opposite-sex partnerships, and 65 same-sex married couples or partnerships. 1,143 households were one person and 383 had someone living alone who was 65 or older. The average household size was 2.41. There were 2,919 families ; the average family size was 2.92. The age distribution was 2,571 people under the age of 18, 345 people aged 18 to 24, 2,344 people aged 25 to 44, 3,964 people aged 45 to 64, and 1,511 people who were 65 or older. The median age was 45.5 years. For every 100 females, there were 94.4 males. For every 100 females age 18 and over, there were 92.2 males. There were 4,703 housing units at an average density of 1,010.9 per square mile, of the occupied units 76.1% were owner-occupied and 23.9% were rented. The homeowner vacancy rate was 1.3%; the rental vacancy rate was 4.6%. 79.5% of the population lived in owner-occupied housing units and 20.4% lived in rental housing units.
2000
At the 2000 census there were 10,691 people, 4,558 households, and 2,803 families living in the CDP. The population density was 2,145.8 people per square mile. There were 4,646 housing units at an average density of 932.5 per square mile. The racial makeup of the CDP in 2010 was 85.0% non-Hispanic White, 0.8% non-Hispanic African American, 0.1% Native American, 5.5% Asian, 0.2% Pacific Islander, 0.3% from other races, and 3.4% from two or more races. Hispanic or Latino people of any race were 4.6%. Of the 4,558 households 28.9% had children under the age of 18 living with them, 51.5% were married couples living together, 6.9% had a female householder with no husband present, and 38.5% were non-families. 25.7% of households were one person and 5.4% were one person aged 65 or older. The average household size was 2.33 and the average family size was 2.80. The age distribution was 20.1% under the age of 18, 3.4% from 18 to 24, 31.6% from 25 to 44, 35.7% from 45 to 64, and 9.2% 65 or older. The median age was 42 years. For every 100 females, there were 94.2 males. For every 100 females age 18 and over, there were 92.1 males. The median household income was $102,094 and the median family income was $122,142. Males had a median income of $79,518 versus $60,058 for females. The per capita income for the CDP was $56,913. About 1.7% of families and 3.8% of the population were below the poverty line, including 3.1% of those under age 18 and 4.5% of those age 65 or over.
