The Kelso Multimodal Transportation Center is an Amtrak train station located near downtown Kelso, Washington, United States. The station also serves the neighboring city of Longview, which is located just across the Cowlitz River. The station is served by Cascades and Coast Starlight trains. Greyhound Lines provides national and regional bus service, while RiverCities Transit provides local transit. Shuttle vans, taxis and rental cars can also be hired at the station.

Kelso is a city in the southwestern part of the U.S. state of Washington and is the county seat of Cowlitz County. At the 2020 census, the population was 12,720. Kelso is part of the Longview, Washington Metropolitan statistical area, which has a population of 110,730. Kelso shares its long western border with Longview. It is near Mount St. Helens.