Napa County GIS Maps
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Napa County, California, has 138,019 residents and covers 748.3 square miles. The population grew 1.1% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Napa County is 06055.
Napa is the county's largest population center. Napa County also includes 10 zip codes, 4 public school districts and 14 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Napa County Trends
- Population
- 138,019▴
- Median Home Value
- $838,800▴
- K-12 Enrollment
- 38,252▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Napa County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Napa County Population
Napa County had 138,019 residents in 2020. That was 1.1% higher than in 2010. Napa County added 13,740 people between 2000 and 2020, which points to steady long-term growth. Napa is the largest city in the county, but it accounts for only about 57% of the total population. The county is fairly spread out, with about 184 people per square mile. Some of the county's most populated postal areas include Napa, Napa and American Canyon.
Population Trend in Napa County CA
Napa County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Napa County Zip Codes
Napa County has 10 zip codes. Some of the county's most populated zip codes include Napa (94558), Napa (94559) and American Canyon (94503). Napa is the largest zip by population, with about 65,473 residents or 47% of the county total. Together, the three largest zips account for about 84% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Napa County CA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 94558 | Napa | 65,473 | ▾ -2% |
| 94559 | Napa | 28,137 | ▴ 3.5% |
| 94503 | American Canyon | 22,069 | ▴ 12.1% |
| 94574 | Saint Helena | 8,317 | ▾ -4.9% |
| 94599 | Yountville | 3,540 | ▴ 17.2% |
| Download all zip code data | |||
Napa County Zip Code populations and trends per most recent census data.
Napa County Demographics
Napa County has a median age of 42.8, which makes the county a little older than California overall. About 19.9% of residents are under 18, while 20.6% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 31.3% of the population, which points to a solid working-age base. About 38.5% of adults have a bachelor's degree or higher, above the statewide figure of 36.5%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for Napa County CA
Median Age
42.8
Under 18
19.9%
Age 65+
20.6%
Bachelor's+
38.5%
Napa County School Districts
Napa County is served by 4 public school districts with 38,252 students enrolled in 2024. The largest districts on the county map are Fairfield-Suisun Unified, Napa Valley Unified and St. Helena Unified. Those three districts account for about 98% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Napa County CA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Fairfield-Suisun Unified School District | 20,304 | 53.1% | ▾ -0.3% |
| Napa Valley Unified School District | 16,077 | 42% | ▾ -0.1% |
| St. Helena Unified School District | 1,104 | 2.9% | ▴ 0.3% |
| Calistoga Joint Unified School District | 767 | 2% | ▾ -2.8% |
| Download all school district data | |||
Napa County school district enrollment and trends per most recent NCES reporting data.
Napa County Housing & Real Estate
Napa County has a median home value of $838,800 and a median gross rent of $2,141. About 64% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the California median, while rents come in above the state average. In March 2026, the median listing price was $1,293,750 and homes spent about 46 days on the market.
Napa County Housing Mix
Napa County housing mix: owner, renter and vacant units.
Napa County Housing Trends
Napa County median home value and rent trend (last 5 years).
Businesses in Napa County, CA
Napa County has 7,257 business listings across 772 categories. The largest categories in Napa County business listings are Winery (1,119, 15.4%), Real Estate Agents (138, 1.9%), and Parks & Recreation (97, 1.3%). The full Napa County business listings dataset includes names, categories, addresses and contact details where available. Napa County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Napa County, CA
| Category | Businesses | Share |
|---|---|---|
| Winery | 1,119 | 15.4% |
| Real Estate Agents | 138 | 1.9% |
| Parks & Recreation | 97 | 1.3% |
| Restaurants | 86 | 1.2% |
| Hotels | 84 | 1.2% |
| Landmark And Historical Building | 78 | 1.1% |
| Churches & Religious Organizations | 74 | 1.0% |
| Wine Bar | 67 | 0.9% |
| Community & Nonprofits | 63 | 0.9% |
| Contractors | 62 | 0.9% |
Napa County Business Listings
| Business | Category | City |
|---|---|---|
| T Party Napa | 3D Printing Service | Napa |
| Duffy's Napa Valley Rehab | Abuse And Addiction Treatment | Calistoga |
| Okaeri Calistoga | Accommodation | Calistoga |
| Granados Hillman LLP | Accountant | St Helena |
| American Canyon Recreation | Active Life | American Canyon |
| United Acupuncture and Herbs | Acupuncture | Napa |
| The Learning Oasis | Adult Education | Napa |
| Pleasures Unlimited | Adult Entertainment | Napa |
| Willis Construction Co. | Adventure Sports Center | Napa |
| Open Hill Creative | Advertising Agency | St Helena |
| Download Napa County business listings | ||
Napa County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Napa County Basemaps
Napa County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Napa County Data Package
This page shows a preview of what's included in the Napa County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Napa County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.