Cowlitz County GIS Maps

Cowlitz 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.

Cowlitz County Parcels

Cowlitz County has 56,641 mapped parcels covering 716,517 acres. The median assessed value is $316,470. Site addresses reach 78.7%. Assessed values reach 88.2%. Browse the interactive Cowlitz County Parcel viewer here.

Cowlitz County Parcel Data Coverage

Field coverage measured across all Cowlitz County parcel records. Download free sample data here.

Cowlitz County Population

Cowlitz County had 110,730 residents in 2020. That was 8.1% higher than in 2010. Cowlitz County added 17,782 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 97 people per square mile. Some of the county's most populated postal areas include Longview, Kelso and Woodland.

Population Trend in Cowlitz County WA

Cowlitz County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Cowlitz County Zip Codes

Cowlitz County has 10 zip codes. Some of the county's most populated zip codes include Longview (98632), Kelso (98626) and Woodland (98674). Longview is the largest zip by population, with about 50,721 residents or 46% of the county total. Together, the three largest zips account for about 83% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Cowlitz County WA

Cowlitz County Zip Code populations and trends per most recent census data.

Cowlitz County Demographics

Cowlitz County has a median age of 41.1, which makes the county a little older than Washington overall. About 22.6% of residents are under 18, while 19.5% 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 30.8% of the population, which points to a solid working-age base. About 17% 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 Cowlitz County WA

Cowlitz County School Districts

Cowlitz County is served by 6 public school districts with 17,066 students enrolled in 2024. The largest districts on the county map are Longview Public Schools, Kelso and Woodland. Those three districts account for about 81% 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 Cowlitz County WA

Cowlitz County school district enrollment and trends per most recent NCES reporting data.

Cowlitz County Housing & Real Estate

Cowlitz County has a median home value of $367,400 and a median gross rent of $1,169. About 66% 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 $461,200 and homes spent about 57 days on the market.

Businesses in Cowlitz County, WA

Cowlitz County has 4,036 business listings across 650 categories. The largest categories in Cowlitz County business listings are Churches & Religious Organizations (112, 2.8%), Gas Stations (77, 1.9%), and Real Estate Agents (73, 1.8%). The full Cowlitz County business listings dataset includes names, categories, addresses and contact details where available. Cowlitz County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Cowlitz County, WA

Cowlitz County Business Listings

Cowlitz County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Cowlitz County Basemaps

Cowlitz 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.

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 Washington — explore the full structure before you buy.