King County GIS Maps
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King County, Washington, has 2,269,675 residents across 635,186 parcels and covers 2,115.3 square miles. The population grew 17.5% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for King County is 53033.
Bellevue is the county's largest population center. King County also includes 86 zip codes, 20 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 parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
King County Trends
- Population
- 2,269,675▴
- Median Home Value
- $811,200▴
- K-12 Enrollment
- 288,674▴
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.
King 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.
King County Parcels
King County has 635,186 mapped parcels covering 1,402,956 acres. The median assessed value is $871,000. Assessed values are on nearly every parcel. Site addresses reach 90.2%. Browse the interactive King County Parcel viewer here.
King County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 635,186 | 100% |
| Owner name | 0 | 0% |
| Owner mailing address | 0 | 0% |
| Site address | 573,140 | 90.2% |
| Land use code | 621,152 | 97.8% |
| Land use description | 0 | 0% |
| Assessed value | 624,408 | 98.3% |
| Land value | 624,413 | 98.3% |
| Improvement value | 624,413 | 98.3% |
| Acreage | 0 | 0% |
| Parcel boundary | 635,186 | 100% |
| Download all King County parcels. | ||
Field coverage measured across all King County parcel records.
King County Population
King County had 2,269,675 residents in 2020. That was 17.5% higher than in 2010. King County added 532,641 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 1,073 people per square mile. Some of the county's most populated postal areas include Redmond, Seattle and Seattle.
Population Trend in King County WA
King County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
King County Zip Codes
King County has 86 zip codes. Some of the county's most populated zip codes include Redmond (98052), Seattle (98115) and Seattle (98103). Redmond is the largest zip by population, with about 77,176 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 King County WA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 98052 | Redmond | 77,176 | ▴ 32.1% |
| 98115 | Seattle | 54,322 | ▴ 17.6% |
| 98103 | Seattle | 53,056 | ▴ 15.6% |
| 98003 | Federal Way | 51,751 | ▴ 17.2% |
| 98023 | Federal Way | 51,713 | ▴ 8.8% |
| Download all zip code data | |||
King County Zip Code populations and trends per most recent census data.
King County Demographics
King County has a median age of 37.3, which makes the county a little younger than Washington overall. About 19.8% of residents are under 18, while 13.8% 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 40.6% of the population, which points to a solid working-age base. About 55.9% of adults have a bachelor's degree or higher, above the statewide figure of 38.8%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for King County WA
Median Age
37.3
Under 18
19.8%
Age 65+
13.8%
Bachelor's+
55.9%
King County School Districts
King County is served by 20 public school districts with 288,674 students enrolled in 2024. The largest districts on the county map are Seattle Public Schools, Lake Washington and Kent. Those three districts account for about 37% 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 King County WA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Seattle Public Schools | 50,773 | 17.6% | ▴ 0% |
| Lake Washington School District | 30,986 | 10.7% | ▴ 0.3% |
| Kent School District | 25,358 | 8.8% | ▾ -1.3% |
| Northshore School District | 22,735 | 7.9% | ▾ -1.9% |
| Federal Way School District | 22,250 | 7.7% | ▴ 2% |
| Download all school district data | |||
King County school district enrollment and trends per most recent NCES reporting data.
King County Housing & Real Estate
King County has a median home value of $811,200 and a median gross rent of $2,035. About 56% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Washington median, while rents come in above the state average. In March 2026, the median listing price was $839,594 and homes spent about 32 days on the market.
King County Housing Mix
King County housing mix: owner, renter and vacant units.
King County Housing Trends
King County median home value and rent trend (last 5 years).
Businesses in King County, WA
King County has 95,809 business listings across 1,462 categories. The largest categories in King County business listings are Real Estate Agents (2,446, 2.6%), Landmark And Historical Building (1,935, 2.0%), and Parks & Recreation (1,505, 1.6%). The full King County business listings dataset includes names, categories, addresses and contact details where available. King County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in King County, WA
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 2,446 | 2.6% |
| Landmark And Historical Building | 1,935 | 2.0% |
| Parks & Recreation | 1,505 | 1.6% |
| Churches & Religious Organizations | 1,361 | 1.4% |
| Coffee Shops | 1,218 | 1.3% |
| Community & Nonprofits | 1,179 | 1.2% |
| Dental Offices | 1,144 | 1.2% |
| Hair Salons | 1,122 | 1.2% |
| Contractors | 1,112 | 1.2% |
| Medical Offices | 1,078 | 1.1% |
King County Business Listings
| Business | Category | City |
|---|---|---|
| Sealed Graphics and Apparel | 3D Printing Service | Seattle |
| Bluewater Medical | Abortion Clinic | Snoqualmie |
| EvergreenHealth Acute Rehabilitation Services | Abuse And Addiction Treatment | Kirkland |
| North Seattle College Bookstore | Academic Bookstore | Seattle |
| Evergreen Smoothie (Inside LA Fitness) | Acai Bowls | Renton |
| Grammercy Apartment Homes | Accommodation | Renton |
| Hunt Jackson PLLC | Accountant | Seattle |
| Wilson Ihrig | Acoustical Consultant | Seattle |
| LA Fitness | Active Life | Bellevue |
| Chee Dynamic Acupuncture | Acupuncture | Seattle |
| Download King County business listings | ||
King County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
King County Basemaps
King 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 King County Data Package
This page shows a preview of what's included in the King 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 parcels, 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 King County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.