Tomales is a census-designated place (CDP) on State Route 1 in Marin County, California, United States. The population was 210 at the 2000 census. The largest employer in Tomales is Tomales High School, which has a student body of approximately 250.
The CDP has a total area of , all land.
Built near the San Andreas Fault, Tomales was affected by the 1906 San Francisco earthquake. One of the town's two cemeteries predates the earthquake, and the damage to the pre-1906 plots show just how widespread the quake's effects were.
There were 73 households out of which 28.8% had children under the age of 18 living with them, 37.0% were married couples living together, 13.7% had a female householder with no husband present, and 43.8% were non-families. 28.8% of all households were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 3.10.
In the CDP the population was spread out with 22.4% under the age of 18, 3.8% from 18 to 24, 21.4% from 25 to 44, 41.9% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 46 years. For every 100 females there were 90.9 males. For every 100 females age 18 and over, there were 87.4 males.
The median income for a household in the CDP was $51,953, and the median income for a family was $52,708. Males had a median income of $41,607 versus $46,389 for females. The per capita income for the CDP was $26,609. None of the families and 14.3% of the population were living below the poverty line, including no under eighteens and 14.3% of those over 64.
Many new shopping areas are being built. Some are making local residence unhappy.