World History Maps Interactive Historical Atlas of the Civil War, detail page for:

Washington, Territory before Nov 6, 1860 - Apr 18, 1861
Washington, Territory Apr 18, 1861 - after Jun 25, 1865

Henry M. McGill US Governor, before Nov 6, 1860 - Jul 20, 1861

US Dept. of The Pacific created merging Depts. of California and Oregon, Jan 15, 1861
William Pickering US Governor, Dec 19, 1861 - after Jun 25, 1865