The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42° north parallel delineates the southern boundary with California and Nevada. Oregon is one of only three states of the contiguous United States to have a coastline on the Pacific Ocean.

• Population: 4,237,256
• Area: 98,379 sq mi
• Capital: Salem
• Largest City: Portland
• Date of Admisson: Feb 14, 1859
• Number of Representatives: 6
• Number of Counties: 36

List of counties: