Alameda County GIS Maps
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Alameda County, California, has 1,682,353 residents and covers 737.3 square miles. The population grew 11.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Alameda County is 06001.
Oakland is the county's largest population center. Alameda County also includes 49 zip codes, 17 public school districts and 15 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.
Alameda County Trends
- Population
- 1,682,353▴
- Median Home Value
- $1,057,400▴
- K-12 Enrollment
- 189,451▾
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.
Alameda 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.
Alameda County Population
Alameda County had 1,682,353 residents in 2020. That was 11.4% higher than in 2010. Alameda County added 238,612 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 2,282 people per square mile. Some of the county's most populated postal areas include Hayward, Fremont and Dublin.
Population Trend in Alameda County CA
Alameda County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Alameda County Zip Codes
Alameda County has 49 zip codes. Some of the county's most populated zip codes include Hayward (94544), Fremont (94536) and Dublin (94568). Hayward is the largest zip by population, with about 79,769 residents or 5% of the county total. Together, the three largest zips account for about 13% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Alameda County CA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 94544 | Hayward | 79,769 | ▴ 9.2% |
| 94536 | Fremont | 73,172 | ▴ 6.4% |
| 94568 | Dublin | 72,590 | ▴ 57.7% |
| 94587 | Union City | 70,121 | ▴ 0.9% |
| 94541 | Hayward | 69,736 | ▴ 13.1% |
| Download all zip code data | |||
Alameda County Zip Code populations and trends per most recent census data.
Alameda County Demographics
Alameda County has a median age of 38.7, which makes the county a little older than California overall. About 20% of residents are under 18, while 14.9% 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 38.3% of the population, which points to a solid working-age base. About 51.5% 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 Alameda County CA
Median Age
38.7
Under 18
20%
Age 65+
14.9%
Bachelor's+
51.5%
Alameda County School Districts
Alameda County is served by 17 public school districts with 189,451 students enrolled in 2024. The largest districts on the county map are Oakland Unified, Fremont Unified and Hayward Unified. Those three districts account for about 44% 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 Alameda County CA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Oakland Unified School District | 33,736 | 17.8% | ▾ -0.3% |
| Fremont Unified School District | 33,073 | 17.5% | ▴ 0.2% |
| Hayward Unified School District | 17,273 | 9.1% | ▾ -1.4% |
| Pleasanton Unified School District | 13,302 | 7% | ▾ -2.7% |
| Livermore Valley Joint Unified School District | 12,945 | 6.8% | ▾ -0.6% |
| Download all school district data | |||
Alameda County school district enrollment and trends per most recent NCES reporting data.
Alameda County Housing & Real Estate
Alameda County has a median home value of $1,057,400 and a median gross rent of $2,318. About 54% 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 $894,000 and homes spent about 25 days on the market.
Alameda County Housing Mix
Alameda County housing mix: owner, renter and vacant units.
Alameda County Housing Trends
Alameda County median home value and rent trend (last 5 years).
Businesses in Alameda County, CA
Alameda County has 58,025 business listings across 1,319 categories. The largest categories in Alameda County business listings are Real Estate Agents (1,156, 2.0%), Churches & Religious Organizations (969, 1.7%), and Auto Repair (951, 1.6%). The full Alameda County business listings dataset includes names, categories, addresses and contact details where available. Alameda County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Alameda County, CA
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 1,156 | 2.0% |
| Churches & Religious Organizations | 969 | 1.7% |
| Auto Repair | 951 | 1.6% |
| Community & Nonprofits | 849 | 1.5% |
| Parks & Recreation | 775 | 1.3% |
| Hair Salons | 773 | 1.3% |
| Dental Offices | 767 | 1.3% |
| Beauty Salons | 763 | 1.3% |
| Landmark And Historical Building | 724 | 1.2% |
| Professional Services | 683 | 1.2% |
Alameda County Business Listings
| Business | Category | City |
|---|---|---|
| Tee Rabbit | 3D Printing Service | Fremont |
| National Abrasives | Abrasives Supplier | San Leandro |
| All Saints Subacute & Transitional Care | Abuse And Addiction Treatment | San Leandro |
| College of Alameda Bookstore | Academic Bookstore | Alameda |
| Paulista Brazilian Kitchen and Taproom | Acai Bowls | Oakland |
| The Union Flats | Accommodation | Union City |
| Nonprofit Suite | Accountant | Oakland |
| West Coast Offshore Unlimited | Active Life | Fremont |
| Dao Integrated Health | Acupuncture | Livermore |
| Addiction Treatment Alameda | Addiction Rehabilitation Center | Alameda |
| Download Alameda County business listings | ||
Alameda County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Alameda County Basemaps
Alameda 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 Alameda County Data Package
This page shows a preview of what's included in the Alameda 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 Alameda County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.