On-Line Atlas of the San Francisco Bay Area

San Mateo County Demographics

The maps below give a feel for the age composition of the communities that make up San Mateo County.  Each community in the maps is coloured, with the colour representing the percent of the community that falls in a given age group.

For example, the first map uses a light colour to show neighbourhoods where children less than 10 years of age make up a small proportion of the population, an intermediate colour for average neighbourhoods, and a dark red for neighbourhoods where children make up a high proportion of the neighbourhood population.

The demographics, or age composition, of a neighbourhood are an important indicator of what the neighbourhood is like.  For example, neighbourhoods with high proportions of young people have different needs and priorities (schools, playgrounds, summer jobs) than neighbourhoods with few youth.

The bar chart below reflects the overall age structure of San Mateo county's population, by 10-year age group.  It shows that the area has many young working people, and a substantial proportion of young families and children. The largest age group in the county falls in the 30-39 range.