List of Washington area codes may refer to:
*
List of Washington (state) area codes
The U.S. state of Washington has six telephone area codes. The state initially used a single area code (206) until it was divided in 1957 with the creation of area code 509 to serve Eastern Washington. In 1995, 206 was split again to serve just t ...
*
List of Washington, D.C., area codes
{{Short pages monitor