Foster City is located in California. Foster City, California has a population of 34,355. Foster City is more family-centric than the surrounding county with 33% households with children. The county percentage for households with children is 29%.
The median household income in Foster City, California is $164,744. The median household income for the surrounding county is $129,972 compared to the national median of $66,222. The median age of people living in Foster City is 43.7 years.
The average high temperature in July is 80.8 degrees, with an average low temperature in January of 39.1 degrees. The annual precipitation is 20.16.