| Area Code | 509 |
| State | Washington |
| Current Time in Area Code 509 | 509> PDT |
| Timezone | Pacific Daylight Time |
| Regional Market Area | Metro Portland Metro Seattle-Tacoma Spokane Area Yakima-Richland-Kennewick Area |
| Metro Area(s) | Ellensburg, WA Kennewick-Richland, WA Moses Lake, WA Othello, WA Pullman, WA Spokane-Spokane Valley, WA Walla Walla, WA Wenatchee, WA Yakima, WA |
| Population (2020) | 1679629 |
| Adjacent Area Codes | 208,236,250,360,425,458,541,604,672,778 |
| Kennewick |
| Pasco |
| Pullman |
| Richland |
| Spokane |
| Spokane Valley |
| Walla Walla |
| Wenatchee |
| Yakima |