The Oregonian is a daily newspaper based in Portland, Oregon, United States, owned by Advance Publications. It is the oldest continuously published newspaper on the U.S. West Coast, founded as a weekly by Thomas J. Dryer on December 4, 1850, and published daily since 1861. It is the largest newspaper in Oregon and the second largest in the Pacific Northwest by circulation. It is one of the few newspapers with a statewide focus in the United States. The Sunday edition is published under the title The Sunday Oregonian. The regular edition was published under the title The Morning Oregonian from 1861 until 1937.

Thomas Jefferson Dryer was a newspaper publisher and politician in the Western United States. A member of the Oregon Territorial Legislature in 1857, Dryer is best remembered as the founder of The Oregonian, an influential and enduring newspaper in the American state of Oregon.