Pacific County, Washington: History
The area that is now Pacific County was part of Oregon Territory in the first part of the nineteenth century. On December 19, 1845, the Provisional Government of Oregon created two counties (Vancouver and Clark) in its northern portion (which is now the state of Washington). In 1849, the name of Vancouver County was changed to Lewis County, and on February 4, 1851, a portion of Lewis County was partitioned off to become Pacific County. The county's boundaries have not changed since its creation. Pacific City was the first county seat, when it was annexed by the US military, the county seat was transferred to Chinookville. The unincorporated community of Oysterville, established in 1852, was the third county seat. The county records were stolen from Oysterville and ferried across Willapa Harbor by residents of South Bend, resulting in that town becoming the new county seat in 1893.