Napa County, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 34th-largest in California
The population of Napa County, California is 136,070 as of the 2023 American Community Survey, making it the 34th-largest county in California. The median household income is $108,970, the median home value is $838,800, and the median age is 42.8.
The population of Napa County has declined 2.9% since 2010 (136,752 → 132,727), a -0.21% annualized rate.
136,070
Population
-0.21%
Annual growth
181
People / sq mi
$108,970
Median Income
$838,800
Median Home Value
Napa County covers 752 sq mi of land at 181.0 people per square mile.
About Napa County, CA
In Napa County, home values do the distinguishing — a median of $838,800. With 136,070 residents, Napa County is a county in California. It ranks #34 among counties in California by population.
Income is a real outlier — the median household pulls in $108,970, putting Napa County near the top of US counties. Poverty is relatively low for US counties at 5.6%, below the national 12.4%. Housing is expensive: the median home is worth $838,800, with typical rent around $2,141.
Degree attainment is near the top of the range for US counties: 38.5% of adults 25+ hold a bachelor’s, above the 35.0% national rate. A solid 12.5% of workers are based at home, below the national 14.0%, and the average commute runs about 25 minutes each way.
High housing values reframe the income picture in Napa County — even solid earnings stretch less against home prices and rents at this level.
Napa County Population History (2010-2024)
The county of Napa County had a population of 136,752 in 2010 and 132,727 in 2024, a -2.9% growth over 14 years. The peak was 140,778 in 2016. Average annual growth rate: -0.21%.
132,727
Population (2024)
136,752
Population (2010)
140,778
Peak (2016)
-0.21%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 136,752 |
| 2011 | 137,668 |
| 2012 | 138,504 |
| 2013 | 139,522 |
| 2014 | 140,331 |
| 2015 | 140,766 |
| 2016 | 140,778 |
| 2017 | 139,818 |
| 2018 | 138,620 |
| 2019 | 137,678 |
| 2020 | 137,465 |
| 2021 | 136,219 |
| 2022 | 134,492 |
| 2023 | 133,444 |
| 2024 | 132,727 |
Race & Ethnicity
| White | 60.1% |
| Black or African American | 1.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.5% |
| Two or More Races | 0.0% |
Age & Sex
42.8
Median Age
50.0%
Female
50.0%
Male
20.6%
Age 65+
Age Distribution
Children (under 15): 15.9% · Seniors (65+): 20.6%
Income & Poverty
| Median household income | $108,970+$12,636 vs state |
| Mean household income | $154,011 |
| Per-capita income | $57,795 |
| Poverty rate | 5.6%-2.8% vs state |
| Unemployment rate | 3.2% |
| Employment-to-population | 60.2% |
Top Industries by Employment
The largest employment sector in Napa County is professional & business services, accounting for 22.1% of workers.
How residents commute
1.2%
Drive alone
3.4%
Carpool
71.3%
Public transit
12.5%
Work from home
24.9 min
Avg commute
Housing
$838,800+$143,400 vs state
Median home value
$2,141
Median rent
64.4%
Homeownership rate
55,601
Total housing units
89.3%
Occupied
10.7%
Vacant
35.6%
Renter-occupied
Social & access
94.3%
With health insurance
97.1%
With broadband internet
18.0%
Foreign-born
5.4%
Veterans (18+)
12.8%
With a disability
66.1%
Speak language other than English at home
Education
84.7%
High School+
38.5%
Bachelor's+
Largest cities in California
Other counties in California
Part of California
Metro areas in California
County rankings
Frequently Asked Questions
Napa County, California has a population of 136,070 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 34th-largest county in California. Population density is 181 people per square mile.
The population of Napa County has declined 2.9% since 2010 (136,752 → 132,727), a -0.21% annualized rate.
The median household income in Napa County, California is $108,970, with mean (average) household income of $154,011 and per-capita income of $57,795. 5.6% of residents live below the federal poverty level.
In Napa County, the largest racial and ethnic groups are White (60.1%), Hispanic or Latino (2.5%), Black or African American (1.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Napa County, California is 42.8 years. Residents are 50.0% female and 50.0% male.
The median home value in Napa County is $838,800 and median monthly rent is $2,141. 64.4% of occupied housing units are owner-occupied. The county has 55,601 total housing units, 10.7% of which are vacant.
The largest employment sector in Napa County, California is professional, scientific, and management services, employing 22.1% of workers. The unemployment rate is 3.2%.
Los Angeles is among the largest cities associated with Napa County, California, with a population of 3,857,897.
Napa County, CA Climate
Napa County, CA has an average annual temperature of 14.5°C (58°F) and receives about 892 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
14.5°C
Avg Temp
892
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 7° / 45° | 195 mm |
| February | 9° / 48° | 148 mm |
| March | 10° / 50° | 122 mm |
| April | 13° / 55° | 53 mm |
| May | 16° / 61° | 15 mm |
| June | 20° / 67° | 5 mm |
| July | 22° / 72° | 1 mm |
| August | 22° / 72° | 3 mm |
| September | 20° / 69° | 13 mm |
| October | 17° / 62° | 51 mm |
| November | 11° / 51° | 134 mm |
| December | 7° / 45° | 152 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Napa County, CA
The most comfortable months to visit Napa County, CA are typically August, September and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near 3°C low). January is usually the wettest month.
Where to stay near Napa County
Visiting or relocating to Napa County, CA? Compare hotels and short-term rentals across the county — live availability and prices.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.