West Pasco is a census-designated place (CDP) in Franklin County, Washington, United States.

[9] The modern development of West Pasco accelerated during the mid-20th century, primarily due to the establishment of the Hanford Site as part of the Manhattan Project during World War II.

The Hanford Site's role in producing plutonium for nuclear weapons brought a substantial population increase to the Tri-Cities area, including Pasco.

To accommodate the growing workforce, residential subdivisions were constructed, and West Pasco began to expand significantly.

[10] In the post-war era, infrastructure development such as roads, schools, and public facilities supported the expanding population.

The region's agricultural roots remained strong, with local farms producing a variety of crops, including wheat, potatoes, and later, wine grapes.

The Columbia Basin's favorable climate and fertile soil proved ideal for viticulture, and the area has since become one of the premier wine-producing regions in the United States.