The politicians who decided the boundaries of Jefferson County were not concerned by details like transportation. The boundary lines run directly west over the Olympic Mountains
, making the western part of the county inaccessible to the county seat, Port Townsend
, except by roads that run through neighboring Clallam County
The county's small population is centered around Port Townsend and the eastern, Seattle/King County end of the county. The western part is rural. Highway 101 parallels the Pacific Ocean beaches along its only oceanside stretch of road in Washington.