(Oregon Territory Seal)

The Territory of Oregon was an organized incorporated territory of the United
States that was formed on August 14, 1848 and existed until February 14, 1859,
when the southwestern portion of the area was admitted to the union as the State
of Oregon. The capital of the territory was first Oregon City, then Salem, followed
briefly by Corvallis, and lastly as Salem, the seat of government for the State of
Oregon.