How many people live in Napa County, CA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 132,700 people living in Napa County, CA. That makes Napa County the 34th-most populous county in California. It is home to 0.34% of people living in the state.
133K
population of Napa County, CA (2024)
0.34%
County share of the California population (2024)
About 132,700 people lived in Napa County, CA in 2024.
Population estimates, 2000–2024
What are Napa County, CA’s age demographics?
About 29,700 Napa County residents are aged 65 and older in 2024. That represents 22.3% of its population. For comparison, the age group represents 16.6% of California’s population and 18% in the US overall.
Another 24,600 Napa County residents, or 18.5% of the population, were children under 18. For comparison, the age group represents 21.4% of California’s population and 21.6% in the US overall.
A higher share of Napa County, CA's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Napa County, CA’s racial and ethnic demographics?
Hispanic residents make up 37.2% of the Napa County, CA population, higher than the national share of 20%. Napa County, CA also has a larger share of people identifying as non-Hispanic Asian (9.2%) than the US overall (6.5%).
In contrast, Napa County’s non-Hispanic Black or African American population accounts for 2%, below the 12.6% nationwide, and the non-Hispanic white population makes up 48.4% of the county, compared with 57.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Napa County, CA has a higher share of a non-Hispanic white population than California as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Napa County, CA is Napa with about 76,900 residents in 2024.
Cities and towns in Napa County, CA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Napa | 76,921 |
| 2. | American Canyon | 21,742 |
| 3. | St. Helena | 5,257 |
| 4. | Calistoga | 5,022 |
| 5. | Yountville | 3,280 |
| 6. | Balance of Napa County | 20,505 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
