Lewis County GIS Maps
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Lewis County, Washington, has 82,149 residents across 55,874 parcels and covers 2,402.8 square miles. The population grew 8.9% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Lewis County is 53041.
Centralia is the county's largest population center. Lewis County also includes 21 zip codes, 16 public school districts and 25 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.
Lewis County Trends
- Population
- 82,149▴
- Median Home Value
- $341,500▴
- K-12 Enrollment
- 16,527▾
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.
Lewis 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.
Lewis County Parcels
Lewis County has 55,874 mapped parcels covering 1,545,191 acres. The median assessed value is $281,400. Site addresses and assessed values are on nearly every parcel. Browse the interactive Lewis County Parcel viewer here.
Lewis County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 55,874 | 100% |
| Owner name | 0 | 0% |
| Owner mailing address | 0 | 0% |
| Site address | 55,823 | 99.9% |
| Land use code | 55,748 | 99.8% |
| Land use description | 0 | 0% |
| Assessed value | 55,680 | 99.7% |
| Land value | 55,874 | 100% |
| Improvement value | 55,874 | 100% |
| Acreage | 0 | 0% |
| Parcel boundary | 55,874 | 100% |
| Download all Lewis County parcels. | ||
Field coverage measured across all Lewis County parcel records.
Lewis County Population
Lewis County had 82,149 residents in 2020. That was 8.9% higher than in 2010. Lewis County added 13,549 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 34 people per square mile. Some of the county's most populated postal areas include Centralia, Chehalis and Winlock.
Population Trend in Lewis County WA
Lewis County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lewis County Zip Codes
Lewis County has 21 zip codes. Some of the county's most populated zip codes include Centralia (98531), Chehalis (98532) and Winlock (98596). Centralia is the largest zip by population, with about 26,669 residents or 32% of the county total. Together, the three largest zips account for about 72% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lewis County WA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 98531 | Centralia | 26,669 | ▴ 10.6% |
| 98532 | Chehalis | 25,572 | ▴ 8.4% |
| 98596 | Winlock | 6,990 | ▴ 7.1% |
| 98570 | Onalaska | 4,489 | ▴ 15.4% |
| 98591 | Toledo | 4,419 | ▴ 11.8% |
| Download all zip code data | |||
Lewis County Zip Code populations and trends per most recent census data.
Lewis County Demographics
Lewis County has a median age of 42.4, which makes the county a little older than Washington overall. About 21.6% of residents are under 18, while 21.2% 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 29.9% of the population, which points to a solid working-age base. About 20.2% of adults have a bachelor's degree or higher, above the statewide figure of 38.8%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Lewis County WA
Median Age
42.4
Under 18
21.6%
Age 65+
21.2%
Bachelor's+
20.2%
Lewis County School Districts
Lewis County is served by 16 public school districts with 16,527 students enrolled in 2024. The largest districts on the county map are Centralia, Chehalis and Rochester. Those three districts account for about 52% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Lewis County WA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Centralia School District | 3,313 | 20% | ▾ -1.8% |
| Chehalis School District | 3,142 | 19% | ▾ -0.1% |
| Rochester School District | 2,175 | 13.2% | ▴ 1.4% |
| Castle Rock School District | 1,484 | 9% | ▾ -0.5% |
| Onalaska School District | 913 | 5.5% | ▴ 2.5% |
| Download all school district data | |||
Lewis County school district enrollment and trends per most recent NCES reporting data.
Lewis County Housing & Real Estate
Lewis County has a median home value of $341,500 and a median gross rent of $1,044. About 74% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Washington median, while rents come in below the state average. In March 2026, the median listing price was $525,000 and homes spent about 58 days on the market.
Lewis County Housing Mix
Lewis County housing mix: owner, renter and vacant units.
Lewis County Housing Trends
Lewis County median home value and rent trend (last 5 years).
Businesses in Lewis County, WA
Lewis County has 3,817 business listings across 615 categories. The largest categories in Lewis County business listings are Churches & Religious Organizations (96, 2.5%), Gas Stations (83, 2.2%), and Parks & Recreation (73, 1.9%). The full Lewis County business listings dataset includes names, categories, addresses and contact details where available. Lewis County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Lewis County, WA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 96 | 2.5% |
| Gas Stations | 83 | 2.2% |
| Parks & Recreation | 73 | 1.9% |
| Farm | 71 | 1.9% |
| Lake | 63 | 1.7% |
| Auto Repair | 61 | 1.6% |
| Real Estate Agents | 56 | 1.5% |
| Contractors | 55 | 1.4% |
| Coffee Shops | 50 | 1.3% |
| Campgrounds & RV Parks | 38 | 1.0% |
Lewis County Business Listings
| Business | Category | City |
|---|---|---|
| Valley View Health Center | Abuse And Addiction Treatment | Onalaska |
| Providence Place | Accommodation | Chehalis |
| Ben M. Kostick CPA Inc. | Accountant | Chehalis |
| Silver Falls Loop Trail | Active Life | Randle |
| Paradise for Adults Only | Adult Entertainment | Centralia |
| Happy Beautiful Wealthy Photography | Advertising Agency | Winlock |
| Tytan Ag LLC | Agricultural Service | Chehalis |
| Heritage Steel of WA | Agriculture | Winlock |
| Strom Field | Airport | Morton |
| Alcoholicos Anonimos Centralia WA. | Alcohol And Drug Treatment Centers | Centralia |
| Download Lewis County business listings | ||
Lewis County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lewis County Basemaps
Lewis 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 Lewis County Data Package
This page shows a preview of what's included in the Lewis 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 Lewis County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.