On-Line Atlas of the San Francisco Bay Area

Marin County Demographics

The maps below give a feel for the age composition of the communities that make up Marin 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 bar chart below reflects the overall age structure of Marin County's population, by 10-year age group.  It shows that the area has many young working people, and a substantial percentage of young families and children.  However, Marin County's population also includes a higher proportion of people in their 40s than other suburban Bay Area communities (such as San Jose and San Mateo County).

By comparison with San Francisco, Marin County has a high proportion of youth.  This is true for most communities on the edge of larger metropolitan areas. At the same time, Marin County has a few selected neighbourhoods with high proportions of seniors.  For the most part, however, Marin County is an area with a younger population.

The demographic, or age, composition of a neighbourhood is 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.