Cowlitz County, Washington

Geography and environment

The county occupies a mix of river valleys and foothills on the western edge of the Cascade Range. The Cowlitz River is the county's principal waterway and has shaped local settlement, transportation and industry. The Columbia River forms part of the county's southern boundary and major highways provide north–south access. Forested uplands, floodplain farmland and pockets of prairie create varied habitats and recreational opportunities.

History and settlement

Long before non‑indigenous settlement the area was home to the Cowlitz people and other Indigenous communities. Euro‑American settlement intensified in the 19th and early 20th centuries, driven by logging and river commerce. The city of Longview developed in the 1920s as a planned community tied to the timber industry and remains an important center for manufacturing and shipping.

Economy and communities

Cowlitz County's economy has long been anchored by timber, wood processing and paper production, with ports and rail supporting exports. Agriculture, manufacturing, health care and services also contribute. Communities include:

• Longview — principal commercial and industrial center
• Kelso — county government and civic services
• Smaller towns and unincorporated areas that support local agriculture and outdoor recreation

Demographics, recreation and notable facts

The county's population has changed steadily since the 2010 count, reflecting regional economic shifts. Residents and visitors use the rivers, parks and trails for fishing, boating and hiking; nearby volcanic landscapes and peaks attract additional outdoor recreation. For official data and more details on administration and services see the county government and related resources linked as general references (county information).