The Oregonian is the major daily newspaper in Portland, Oregon, 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. It is the largest newspaper in Oregon and the Pacific Northwest by circulation.

The paper or its reporters were nominated for one or more Pulitzer Prize awards nearly every year since 1993. The Oregonian received the 2001 Pulitzer Prize for Public Service. Its journalists have received six other Pulitzers in that time, among them: Explanatory Reporting (1999), Feature Writing (2001), Editorial Writing (2006), and the Breaking News Reporting (2007).

The Oregonian is home delivered throughout Multnomah, Washington, Clackamas, and Yamhill counties in Oregon and Clark County, Washington; it is also home delivered in parts of Marion and Columbia counties. Some independent dealers deliver the newspaper outside of that area, though in 2006 its became no longer available in far eastern Oregon and the southern Oregon Coast, and starting in December 2008 "increasing newsprint and distribution costs" caused the paper to stop deliveries to all areas south of Albany.