In 2017, Napa County had an estimated 141,005 residents. Over the last eight years, the total population in Napa County has steadily increased. From 2009 to 2014, the county had an annual population growth of 1%, primarily due to the population increase in American Canyon; but the growth rate has tapered off in recent years (only a 0.1% increase from 2016 to 2017). Despite this recent plateau, the total population in Napa County, as well as statewide, is projected to increase 1% per year through 2025. Population growth rate is shaped by the number of births, deaths, and people moving into and out of the area. In Napa County, the increase in population is likely due to older adults, aged 55 and older, moving into the county.

The City of Napa is the largest incorporated city or town in Napa County, with 79,722 residents in 2017. American Canyon, in the southernmost part of the county, has the second largest population at 20,341 residents. Up Valley, the cities of Calistoga and St. Helena and the town of Yountville have populations of 5,281, 6,056, and 2,978, respectively. In recent years (2015 to 2017), the fastest growing cities are St. Helena (2.7%), Napa (1.5%), and American Canyon (1.3%).

The birth rate is a measure that describes the number of births for a population or area for every thousand people. Birth rates for both Napa County and California are presented here. Because the total number of births that occur each year in Napa County is relatively low, data are grouped in two-year increments to ensure the stability and reliability of the numbers. In 2016-2017, there were 9.5 births in Napa County for every 1,000 residents.

Over the last nine years, birth rates have decreased for the county (down 23%) and the state (down 17%), and Napa County has maintained a lower birth rate than the state over this same period.

Individuals aged 25-54 make up the largest age group in Napa County at 39% of the population – however, this percentage has declined (down 4%) since 2009. The percentages of youth (those aged under 5 and those aged 5-17 years) currently represent 22% of the population, dropping 15% from 2009. Young adults, individuals aged 18 to 24 years, represent approximately 9% of the population. The percentages of older adult groups in the county (those aged 55-64 years and those aged 65 years or greater) represent 31% of the population and have increased steadily, as the Baby Boomer generation has matured – a phenomenon sometimes known as “the silver tsunami.” Each age group also has varying experiences in their social environments. Read more in the following domain pages – Respect & Social Inclusion, Civic Participation & Employment and Social Participation.

Why do we group residents by age?

Age groups are groups of individuals falling within a certain age range – for example, younger than five years of age (4 and younger) or five to seventeen years of age (5-17). The different age groups presented typically have distinct interests, priorities, employment and other needs, which is why it is helpful to know approximately how many people in a given age group are in a population.


In 2017, Napa County’s under-five population made up only 5.3% of the total population, lower than the statewide rate of 6.4%.

This youngest age group has decreased in size both within the county and in the state as a whole since 2009, reflecting both the decreasing birth rate and the relative increase in the sizes of other age groups, including older adults.


In contrast to the under-five population, the proportion of older adults in Napa County has consistently exceeded the statewide average; currently 17.4% of Napa County residents are aged 65 or older compared to 13.2% of the California population. This older adult population in the county has grown 19% since 2009 and the total number of older adults is projected to increase approximately 28% by 2025.

Napa County’s population is evenly divided by sex, with 50% women and 50% men. It is important to note that the sources of this data, the American Community Survey, only collects data on “males” and “females”. No other answer options were provided in the survey. 

For demographic purposes, the term “sex” refers to biological features that classify people as “male” or “female" while "gender" refers to the socially constructed characteristics of women and men, such as norms, roles and relationships. Some individuals may be born with physical characteristics of both sexes (“intersex”) or feel that their biological characteristics do not align with their gender identity (“transgender”). Based on a study conducted at the state level, an estimated 0.8% of Napa County residents identify as transgender. The number of intersex individuals in Napa County is unknown. To find more about how these identities affect individual  and community experiences, visit the Respect & Social Inclusion domain page.

Percent of the Total Population by Sex in Napa County

Source: American Community Survey Five Year Estimates, 2013-2017

 “Race” is a category often used to identify to an individual’s apparent biological heritage (based on physical characteristics), though the notion that there are clear, biologically-fixed characteristics that distinguish one race from another is not supported by science. An individual’s racial identity – and in particular, the group to which others see an individual as belonging – has a large influence on all aspects of their life, including the experience of Respect & Social Inclusion and other features of a livable community.

The term “ethnicity” is often used to describe an individual’s cultural heritage – the group or groups with which a person shares history, customs, norms, and activities – even when the person may not share skin color (or other physical characteristics used to describe race) with others in the group. The United States Census identifies Hispanic and Latino designations as referring to a person’s ethnicity rather than their race.


Seventy-three percent of Napa County residents are classified as white, the largest racial group in the county and higher than the statewide level (61%). The next largest groups are “Some Other Race” (12%), Asian (8%), and two or more races (4%).

Snapshot of the Proportion of the Total Population by Race

Source: American Community Survey Five Year Estimates, 2013-2017

Percent of the Total Population by Race in Napa County

Source: American Community Survey Five Year Estimates, 2013-2017


Thirty-three percent of Napa County residents identify as Hispanic/Latino. This proportion is slightly lower than the state’s population of Hispanic/Latino residents, which falls at 36% of the total state population.

Percent of the Total Population by Ethnicity: Napa County and California 

Source: American Community Survey Five Year Estimates, 2013-2017



The population of Napa County reflects the State of California’s population in many aspects. The percentages of the county population with disabilities (11%), individuals born outside of the U.S. (23%), and individuals living below 200% of the federal poverty level (26%) are similar to the state. The percentages of persons with limited English proficiency (16%), persons below the poverty level (9%), and households who rent (37%) all fall below state averages, while median household income ($79,637) is higher than in California overall.


Select Demographics in Napa County

Source: American Community Survey Five Year Estimates, 2013-2017




Select Employment Statistics

Source: American Community Survey, 2017; UC Berkeley Labor Center, 2016


Source: California Health Interview Survey, 2013-2017 (pooled)


Total Population

State of California Department of Finance. (2017). Projections. Retrieved December 20, 2018 from

Sex & Gender

Flores, A. R., Herman, J. L., Gates, G. J., & Brown, T. N. T. (2017). How many adults identify as transgender in the United States?. Los Angeles, CA: The Williams Institute. Retrieved from

World Health Organization. (2018). Gender, equity and human rights. Retrieved December 21, 2018 from