Washington's Regional Transportation Planning Organizations
Each of Washington’s counties except San Juan County is part of an RTPO. RTPOs were established as a part of the GMA legislative process and play an important role in growth management.
Full List of RTPOs
Washington's Metropolitan Planning Organizations
Metropolitan Planning Organizations (MPO) are federally mandated and funded policy-making organizations designated for urban areas with 50,000 or more people. MPOs with a population in excess of 200,000 are also designated as Transportation Management Areas with additional responsibilities. MPOs must comply with federal transportation requirements, which are generally consistent with and complementary to state Growth Management Act requirements. The boundaries of most of Washington’s MPOs are the same as the boundaries for their respective RTPOs.
There are 12 MPOs in Washington State, including four bi-state MPOs. This map is a portal to each MPO and its long-range plan. For specific MPO requirements, visit the WSDOT’s Metropolitan Transportation Planning page.