Tri-Cities metropolitan area

Metropolitan Statistical Area in Washington, United States The Kennewick–Pasco–Richland metropolitan area—colloquially referred to as the Tri-Cities metropolitan area, and officially known as the Kennewick–Richland, WA Metropolitan Statistical Area—is a metropolitan area consisting of Benton and Franklin counties in Washington state, anchored by the cities of Kennewick, Pasco, and Richland (the Tri-Cities). As of 2025, the U.S. Census Bureau estimates the population of the metropolitan area to be 324,334, making it the third largest metropolitan area located entirely in Washington, after the Seattle metropolitan area and the Spokane metropolitan area. Although it is located outside of the metropolitan area, the census-designated place (CDP) of Burbank (located in Walla Walla County) is part of the Tri-Cities urban area. The Tri-Cities metro area is a constituent piece of the Kennewick–Richland–Walla Walla, WA Combined Statistical Area, which consists of the Tri-Cities (Benton and Franklin Counties) along with the Walla Walla metropolitan area (Walla Walla County). Counties Benton Franklin Communities The following are cities in the Kennewick–Richland, WA MSA categor