Kelso, WA Properties | Real Property Associates, Inc.

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Kelso is a city in southwest Washington and the county seat of Cowlitz County. It sits on the Cowlitz River, about six miles from the Oregon state line, and shares its long western border with Longview, with which it forms a combined community often referred to as the Twin Cities. The 2020 census counted roughly 12,700 residents within the city, while the Longview metropolitan area is home to more than 100,000. The area's earliest known inhabitants were the Cowlitz people, who lived in longhouses in villages along the river. European-American settlement began in 1847, when Scottish surveyor Peter Crawford laid out the community that became Kelso. The city later grew on lumber manufacturing and rail, industries that shaped the wider Columbia River valley, and its gridded center extends across the Allen Street Bridge into Longview. Kelso's setting is framed by Mount St. Helens to the east, visible on clear days, and by the Cowlitz and Columbia rivers. The 1980 eruption of Mount St. Helens is part of the region's modern story, and parts of the city, including the Three Rivers Golf Course, were built on volcanic ash dredged from the Cowlitz River. The Cowlitz County Historical Museum preserves exhibits on the area's tribal, settler, and industrial past. Interstate 5, completed through the area in 1981, made Kelso a practical base for commuters, and the city functions today as a residential and government center with schools, retail, and services. Public education is provided by Kelso Public Schools, and Kelso High School competes in the Greater St. Helens League. Kelso suits residents seeking an affordable Pacific Northwest river-valley community with access to outdoor recreation and the Columbia River region to the south.

Population 12,720

County Cowlitz

Active Listings 338

Frequently Asked Questions

What county is Kelso in?

Kelso is in Cowlitz County, Washington, and serves as the county seat. The city sits on the Cowlitz River in southwest Washington, about six miles from the Oregon state line.

Is Kelso near Mount St. Helens?

Yes. Kelso lies near Mount St. Helens, which is visible from the city on clear days. The Mount St. Helens National Volcanic Monument is a popular day-trip destination, and the 1980 eruption is part of the region's history.

What is the relationship between Kelso and Longview?

Kelso shares its long western border with Longview, and the two cities form a combined community often called the Twin Cities. They grew together on lumber and rail industries and now share a regional economy and amenities.

What school district serves Kelso?

Kelso is served by Kelso Public Schools, which operates the city's public schools. Kelso High School competes in the Greater St. Helens League and has long-standing athletic rivalries with schools across the river in Longview.

City Guide

About Kelso

Real Estate & Housing

Kelso's housing stock reflects its lumber-town origins, with older single-family homes on a gridded street pattern near the river and downtown, plus mid-century and later neighborhoods spreading outward. Areas such as North Kelso hold well-kept older homes, while newer subdivisions appear on the city's edges. The city's position in the Longview metro and its Interstate 5 access support steady demand, generally at more approachable price points than the Seattle or Portland markets.

Neighborhoods

Kelso's neighborhoods fan out from a gridded center that extends across the Allen Street Bridge into Longview, reflecting the two cities' shared growth. North Kelso is one of the city's established residential areas, known for older single-family homes. Development also spreads along the Cowlitz River and toward the Interstate 5 corridor, giving the city a mix of in-town, river-adjacent, and newer suburban settings.

Lifestyle in Kelso

Life in Kelso combines a small-city Pacific Northwest pace with river-valley recreation. Residents have access to Cowlitz River salmon fishing, Lake Sacajawea Park across the river in Longview, and day trips to Mount St. Helens and the Columbia River. The climate is mild and maritime, with more sunshine than coastal Washington. The city's downtown, county services, and schools anchor daily life, with Longview's larger retail and medical options next door.

Schools & Education

Public education is provided by Kelso Public Schools, which serves students across the city. Kelso High School competes in the Greater St. Helens League and carries a long athletic tradition, including rivalries with Longview schools across the Cowlitz River. The district's mission emphasizes preparing students for learning and achievement, and its campuses anchor neighborhood life throughout the community. Families in the Kelso-Longview area also benefit from nearby community and technical education options in Cowlitz County.

Getting Around

Interstate 5 is Kelso's principal highway, running through the city and linking it north to the Seattle-Tacoma area and south toward Portland and Oregon, roughly six miles away. Completed through the area in 1981, the freeway attracted commuting homebuyers and anchors the city's role in the Longview metro. Local roads and the Allen Street Bridge connect Kelso directly to Longview and the Columbia River waterfront.

Parks & Recreation

Recreation around Kelso centers on the region's rivers and mountains. The Cowlitz River offers salmon and steelhead fishing, and Mount St. Helens National Volcanic Monument is a popular day-trip destination. The Three Rivers Golf Course, built on volcanic ash dredged from the Cowlitz River, provides local golf, while Lake Sacajawea Park in Longview offers walking paths and green space. The Cowlitz County Historical Museum adds a cultural stop.

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