San Geronimo, CaliforniaSan Geronimo is a town located in the San Geronimo Valley in Marin County, California. As of the 2000 census, the town had a total population of 436.
As of the census of 2000, there are 436 people, 174 households, and 120 families residing in the town. The population density is 110.8/km² (287.4/mi²). There are 176 housing units at an average density of 44.7/km² (116.0/mi²). The racial makeup of the town is 93.12% White, 0.92% African American, 0.69% Native American, 0.92% Asian, 0.46% Pacific Islander, 0.23% from other races, and 3.67% from two or more races. 2.52% of the population are Hispanic or Latino of any race.
There are 174 households out of which 28.7% have children under the age of 18 living with them, 51.1% are married couples living together, 14.9% have a female householder with no husband present, and 31.0% are non-families. 18.4% of all households are made up of individuals and 2.9% have someone living alone who is 65 years of age or older. The average household size is 2.47 and the average family size is 2.70.
In the town the population is spread out with 17.9% under the age of 18, 6.9% from 18 to 24, 26.8% from 25 to 44, 39.4% from 45 to 64, and 8.9% who are 65 years of age or older. The median age is 44 years. For every 100 females there are 92.9 males. For every 100 females age 18 and over, there are 96.7 males.
The median income for a household in the town is $58,542, and the median income for a family is $60,875. Males have a median income of $70,536 versus $32,292 for females. The per capita income for the town is $31,960. 10.4% of the population and 9.9% of families are below the poverty line. Out of the total people living in poverty, 18.4% are under the age of 18 and 0.0% are 65 or older.