Sonoma County, CA Population

Overview

492,498

Total Population

42.5

Median age

50.88%

Female population %

96.5:100

Gender ratio (M:F)

60-64 years

Largest age group

56.0

Total dependency ratio

White

Largest racial group

135,683

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Sonoma County's population is old compared to the rest of the country:

The median age in Sonoma County is 42.5, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Sonoma County's population under 18 was 19.65%, compared to the 22.51% nationwide.
Sonoma County's elderly or the senior population (over 65 age) was 19.86% as compared to 16.04% nationwide.
Of the total population in Sonoma County, 16.05% were under the age of 15, 17.77% aged 15 to 29, 46.31% aged 30 to 64, 17.45% aged 65 to 84, and 2.41% were 85 years of age and older.

There are 8,702 more females than males in Sonoma County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.88% females and 49.12% males in Sonoma County, CA.
The Sonoma County, CA gender ratio is 96.5:100 i.e. 96.5 men to 100 women (0.965).
For male population, the largest age group is 55-59 years with a population of 17,093.
For the female population, the largest age group is 60-64 years with a population of 18,876.

Sonoma County's population has become increasingly diverse:

Racial distribution of Sonoma County population: 70.35% are White, 1.57% are Black or African American, 1.07% are American Indian and Alaska Native, 4.39% are Asian, 0.33% are Native Hawaiian and other Pacific Islander, 13.19% are some other race and 9.10% are multiracial.
Sonoma County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 135,683 is Hispanic or Latino (of any race), and 356,815 (72.45% of the total population) is Non-Hispanic.
The largest racial group in Sonoma County is White with a population of 346,482 (70.35% of the total population).

Sonoma County's population has already reached its peak and is showing a trend of decline:

The peak population was 502,445 in the year 2016
From 2000 to 2010, Sonoma County's population increased by 24,311 (5.28%), as compared to the national growth of 9.63%.
From 2010 to 2020, Sonoma County's population increased by 3,606 (0.74%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Sonoma County's population was lowest in year 2000 at 460,364.