Washington county i Oregon

Arkiv:
Länk: Washington county

The Provisional Legislature of Oregon created the county as Twality District on July 5, 1843. Twality was one of the original four districts of the Provisional Government of Oregon in Oregon Country along with Clackamas, Champooick (later Marion), and Yamhill counties. Columbia, later known as Hillsboro, was selected as the county seat in 1850. With the exception of 160 acres annexed from Multnomah County in 2014, Washington County obtained the vast majority of its present boundaries in 1854 with the creation of Columbia County to the north and Multnomah County to the east.

The construction of Canyon Road to Beaverton helped Portland to consolidate its position as the primary port of Oregon, and defeat the rival efforts of settlements such as Oregon City and Milwaukie.