What is the largest city in Napa County, CA?

Napa is the largest city or town in Napa County, with about 78,239 residents.

How many ZIP codes are in Napa County?

Napa County includes 10 ZIP Code Tabulation Areas, including 94503, 94508, 94558, 94559, 94562.

What is the population of Napa County, CA?

About 134,869 people live in Napa County, based on American Community Survey 5-year estimates.

What counties border Napa County?

Napa County borders Sonoma County, Solano County, Yolo County, Lake County.

Napa County, CA: Cities, ZIP Codes & Local Data

Population

134,869

Land area

752sq mi

People per sq mi

179

ZIP codes

10

Napa County at a glance

Napa County is 29% less dense than California as a whole.
The median household income is $111,471, 12% above the California median of $99,122.
A typical owner-occupied home is valued at $869,500 (18% above California) and median rent is $2,237 a month.
Its largest cities are Napa (78,239), American Canyon (21,691) and St. Helena (5,318).

Local data for Napa County, CA

Counts from official public data

Housing and community stats

Napa County, CA, American Community Survey 2020-2024

Full profile

Median household income

$111,471

Poverty rate

8.5%

Median home value

$869,500

Prices -1.0% in a year

Median rent

$2,237/mo

Homeownership

63.4%

Bachelor's or higher

39.8%

Median age

42.9

Average commute

24.9 min

Largest reported origins and ancestries: Mexican Americans (41,157), German Americans (13,151), Irish Americans (11,166).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

4.2%

Sep 2026, -0.1 pts in a year

Average annual pay

$73,209

79,072 jobs, 2025

Income per person

$103,017

BEA, 2024

Federal spending

$858M

FY 2026, $6,220 per person

PPP loans

$589M

4,805 loans, 58,540 jobs reported

Campaign donations

$2.2M

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

Napa County, CA, workers 16 and older. American Community Survey 5-year estimates

Drove alone70.3%
Carpooled9.3%
Public transit1.1%
Walked2.8%
Bicycle0.7%
Taxi, ride-hailing, motorcycle or other1.2%
Worked from home14.6%

Average one-way commute: 24.9 minutes for people who do not work from home.

Environment and hazard risk

Napa County, CA, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively High

Top: drought

Storm events since 1996

331

Most often strong wind

Flood insurance policies

868

1.9% of homes, county

July high / Jan low

85° / 39°F

39.7 inches of rain a year

Hazards, floods and storm history Check a flood zone 79 historic places

Health statistics

Share of adults in Napa County, CA, CDC PLACES estimates

All 40 measures

Obesity

27.9%

U.S. 33.3% -5.4 pts

Diabetes

11.4%

U.S. 12.1% -0.7 pts

Smoking

10.4%

U.S. 12.8% -2.4 pts

Uninsured (18-64)

9.7%

U.S. 11.1% -1.4 pts

Cities, towns and ZIP codes in Napa County

Population shown

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Frequently asked questions

What is the largest city in Napa County, CA?: Napa is the largest city or town in Napa County, with about 78,239 residents.
How many ZIP codes are in Napa County?: Napa County includes 10 ZIP Code Tabulation Areas, including 94503, 94508, 94558, 94559, 94562.
What is the population of Napa County, CA?: About 134,869 people live in Napa County, based on American Community Survey 5-year estimates.
What counties border Napa County?: Napa County borders Sonoma County, Solano County, Yolo County, Lake County.