Washington County Maps
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Washington has 39 counties, a population of more than 8 million people, about 605 zip codes and 367 public school districts. Those counties vary widely in population, school enrollment, zip code coverage and local boundary structure. King County has the largest population in the state, while Garfield County has the smallest. Browse the map, population, zip codes, school districts, county subdivisions and county list sections below to explore further. Or, simply start typing in the box below to go directly to that county.
Interactive Washington County Map
This Washington county map preview highlights population-by-county context, ZIP code coverage, school districts, and local boundary structure. Full statewide and county-level data packages are available when you need complete downloadable datasets. Click or tap any county to view its maps, trends and data.
Start with a free preview, or go straight to the full Washington dataset .
Washington Population By County
Washington's population was over 8 million in 2020, up 980,741 (14.58%) residents from 2010. King County had the largest population in the state with more than 2 million people. Pierce and Snohomish Counties also stand out as major population centers. Garfield County was the least populated area in Washington with only 2,286 residents. The table below compares Washington county populations and recent population trends.
The Most Populated Counties In Washington
| County | Population | Trend (2010-2020) |
|---|---|---|
| King County | 2,269,675 | ▴ 17.52% |
| Pierce County | 921,130 | ▴ 15.83% |
| Snohomish County | 827,957 | ▴ 16.07% |
| Spokane County | 539,339 | ▴ 14.46% |
| Clark County | 503,311 | ▴ 18.33% |
| Download all county population data | ||
County populations reflect the latest state serving context (2020).
Washington County Map With ZIP Codes
Washington has about 605 zip codes statewide. King County contains the most zip codes, with 86. County-level zip code maps give a faster and clearer way to understand local coverage as zip boundaries can span county and municipal lines. The maps below highlight a few Washington counties.
Washington School Districts By County
Washington has 367 public school districts with 1,234,356 students enrolled as of 2024. King County stands out for both district count and total enrollment. Spokane County posted the largest recent enrollment gain. The table below compares county level school district totals and recent enrollment trends across the state.
Largest School Districts in Washington
| County | Districts | Enrollment | Trend |
|---|---|---|---|
| King County | 20 | 288,674 | ▴ 0.05% |
| Spokane County | 19 | 78,943 | ▴ 1.15% |
| Pierce County | 17 | 159,960 | ▴ 0.29% |
| Yakima County | 16 | 52,076 | ▾ 1.09% |
| Lewis County | 16 | 16,527 | ▾ 0.82% |
| Download all school district data | |||
School district enrollment and trend values reflect the most recent state-level context (2024).
Washington County Map With County Subdivisions
Washington has about 242 county subdivisions statewide. These boundaries add another layer of local detail and help show how subdivision lines fit inside county boundaries. The previews below highlight a few counties with available subdivision map coverage.
Get the Full Washington Data Package
The sections above provide a preview of Washington county maps and county-level data. The full package includes complete statewide coverage with ready-to-use files for mapping, planning, and analysis.
Everything is organized to save hours of data collection, cleanup, and integration work.
- County map exports and boundary coverage for every county in Washington
- Statewide GIS layers for ZIP codes, subdivisions, school districts, roads, water, and political boundaries
- Population, demographics, school, housing, and trend context aligned across counties
- Database files, map-ready exports, and documentation designed for faster research workflows
Includes GIS layers, maps, demographics, analytics, database files and planning tools.