The area code 509 is located in Kennewick, Washington.
Area code 509 serves the vibrant region of Kennewick, Washington, along with other major cities in the Tri-Cities area, including Pasco and Richland. Established in 1957, this area code encompasses a diverse landscape, rich in agriculture and outdoor recreation with the beautiful Columbia River nearby. Notably, Kennewick hosts the popular Kennewick Man exhibit, showcasing one of the oldest human skeletons found in North America. The region is also known for its award-winning wineries, drawing wine enthusiasts from across the country. Whether you’re calling a friend or planning a visit, area code 509 connects you to the heart of southeastern Washington.