No. It is in Washington state and borders Oregon.
Washington and Oregon border the Columbia River.
Columbia river
Columbia River
The Columbia River separates Washington and Oregon. It runs from British Columbia, Canada, through Washington state, and forms part of the border between Washington and Oregon before emptying into the Pacific Ocean.
If you mean Oregon and Washington, you'd be looking for the Columbia River...
The Columbia River.
Columbia River
The Columbia River.
The Columbia River separates Washington State and Oregon.
Columbia river
That would be the Columbia River. This river separates approximately two thirds of southern Washington from northern Oregon. At a place on the 46th parallel north this river total enters the state of Washington, and this parallel becomes the border line that separates the two states.
Potomac River