San Mateo County, California

The San Mateo County is a county located in the state of California in the Bay Area of San Francisco. The administrative headquarters ( County Seat) is Redwood City, the largest city in San Mateo.


The county covers an area of 1919 km ². It covers most of the peninsula from San Francisco south of San Francisco and north of Santa Clara County. The International Airport of San Francisco is located in the northern part of the county, and Silicon Valley begins in the southern part. In the extreme south of the island Año Nuevo County Iceland lies.


The San Mateo County was formed in 1856 from parts of San Francisco County. It was named after Saint Matthew. As a place name St. Matthew first appears in 1776. By 1850, found as a place name San Matheo.

In the city of Burlingame San Mateo County is the public Burlingame library. It was founded by the established urban Regulation on 11 October 1909. After the Loma Prieta earthquake in 1989, the city approved the issuance of bonds for reconstruction. The library has won awards for its architecture and was featured in Library Journal.

Demographic data

1900-1990 2000 2010

According to the census of 2000, there were 707 161 people in San Mateo County. There were 254,103 households and 171,265 families. The population density was 608 people per square kilometer. The racial the population was composed of 59.49 % White, 3.51 % African American, 0.44 % Native American, 20.04 % Asian, 1.33 % Pacific Islander residents from the and 10.17% from other races groups; 5.02% were descended from two or more races. 21.88 % of the population were Hispanic or Latino of any race.

Of the 254 103 households out of which 31.10 % have children under the age of 18 living with them. 53.00 % were married couples living together, 10.10% had a female householder with no husband. 32.60 % were non-families. 24.60 % of all households and 8.40% had someone living alone at the age of 65 years or older. The average household size was 2.74 and the average family size was 3.29 persons.

Based on the county the population was spread out with 22.90 % under the age of 18, 7.90 % from 18 to 24, 33.20% from 25 to 44 years, 23.50% between 45 and 64 years and 12.50% were 65 years old or older. The average age was 37 years. For every 100 females there were 97.80 males, 100 females age 18 and over, there were 95.60 males.

The median income for a household was $ 70,819, and the median income for a family was $ 80,737. Males had a median income of $ 51,342, women $ 40,383. The per capita income was $ 36,045. 5.80% percent of the population and 3.50 % of families are below the poverty line. 6.00 % of those under age 18 and 5.10% were 65 years or older.