San Diego County GIS Maps
Home » California » San Diego County
San Diego County, California, has 3,298,634 residents and covers 4,208.8 square miles. The population grew 6.6% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for San Diego County is 06073.
San Diego is the county's largest population center. San Diego County also includes 115 zip codes, 13 public school districts and 19 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.
San Diego County Trends
- Population
- 3,298,634▴
- Median Home Value
- $791,600▴
- K-12 Enrollment
- 207,456▾
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.
San Diego 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.
San Diego County Population
San Diego County had 3,298,634 residents in 2020. That was 6.6% higher than in 2010. San Diego County added 484,801 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 784 people per square mile. Some of the county's most populated postal areas include Chula Vista, San Diego and Chula Vista.
Population Trend in San Diego County CA
San Diego County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
San Diego County Zip Codes
San Diego County has 115 zip codes. Some of the county's most populated zip codes include Chula Vista (91911), San Diego (92154) and Chula Vista (91910). Chula Vista is the largest zip by population, with about 85,442 residents or 3% of the county total. Together, the three largest zips account for about 8% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in San Diego County CA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 91911 | Chula Vista | 85,442 | ▴ 2.9% |
| 92154 | San Diego | 84,027 | ▴ 5.4% |
| 91910 | Chula Vista | 79,613 | ▴ 5% |
| 92126 | San Diego | 74,788 | ▴ 2% |
| 92021 | El Cajon | 70,584 | ▴ 8.5% |
| Download all zip code data | |||
San Diego County Zip Code populations and trends per most recent census data.
San Diego County Demographics
San Diego County has a median age of 37.1, which makes the county a little younger than California overall. About 21.1% of residents are under 18, while 15% 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 36.2% of the population, which points to a solid working-age base. About 42.1% 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 San Diego County CA
Median Age
37.1
Under 18
21.1%
Age 65+
15%
Bachelor's+
42.1%
San Diego County School Districts
San Diego County is served by 13 public school districts with 207,456 students enrolled in 2024. The largest districts on the county map are San Diego City Unified, Poway Unified and San Marcos Unified. Those three districts account for about 71% 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 San Diego County CA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| San Diego City Unified School District | 94,828 | 45.7% | ▾ -0.5% |
| Poway Unified School District | 34,259 | 16.5% | ▾ -1.4% |
| San Marcos Unified School District | 18,837 | 9.1% | ▾ -2.7% |
| Vista Unified School District | 18,096 | 8.7% | ▾ -1.9% |
| Oceanside Unified School District | 14,866 | 7.2% | ▾ -2.7% |
| Download all school district data | |||
San Diego County school district enrollment and trends per most recent NCES reporting data.
San Diego County Housing & Real Estate
San Diego County has a median home value of $791,600 and a median gross rent of $2,154. About 55% 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 $925,000 and homes spent about 38 days on the market.
San Diego County Housing Mix
San Diego County housing mix: owner, renter and vacant units.
San Diego County Housing Trends
San Diego County median home value and rent trend (last 5 years).
Businesses in San Diego County, CA
San Diego County has 134,251 business listings across 1,527 categories. The largest categories in San Diego County business listings are Real Estate Agents (3,253, 2.4%), Auto Repair (1,954, 1.5%), and Churches & Religious Organizations (1,799, 1.3%). The full San Diego County business listings dataset includes names, categories, addresses and contact details where available. San Diego County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in San Diego County, CA
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 3,253 | 2.4% |
| Auto Repair | 1,954 | 1.5% |
| Churches & Religious Organizations | 1,799 | 1.3% |
| Medical Offices | 1,649 | 1.2% |
| Landmark And Historical Building | 1,647 | 1.2% |
| Beauty Salons | 1,612 | 1.2% |
| Hair Salons | 1,586 | 1.2% |
| Dental Offices | 1,575 | 1.2% |
| Mexican Restaurants | 1,574 | 1.2% |
| Contractors | 1,484 | 1.1% |
San Diego County Business Listings
| Business | Category | City |
|---|---|---|
| Lamb Screen Printing | 3D Printing Service | Oceanside |
| Villa Oasis San Diego | Abuse And Addiction Treatment | Rancho Santa Fe |
| Common Knowledge Bookstore | Academic Bookstore | San Diego |
| SAMBAZON Açaí Bowls | Acai Bowls | Cardiff-By-The-Sea |
| Quiet Mind Mountain Retreat San Diego | Accommodation | Julian |
| Aguilera's Bookkeeping | Accountant | Vista |
| THE SKN RN acne clinic | Acne Treatment | Chula Vista |
| Gregs Backyard Concerts | Acoustical Consultant | Encinitas |
| Alba Racing | Active Life | Santee |
| Balboa Park Holistic Wellness Center | Acupuncture | San Diego |
| Download San Diego County business listings | ||
San Diego County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
San Diego County Basemaps
San Diego 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 San Diego County Data Package
This page shows a preview of what's included in the San Diego 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.
One-time · instant download · 30-day refund guarantee · See full package details
Preview a Live Package Demo
See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from California — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border San Diego County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.