The Orbis Cascade Alliance is a library consortium serving academic libraries in the Northwestern United States. The consortium was formed through the 2003 merger of two previous consortia, Orbis and Cascade, which consisted of libraries in Oregon and Washington, respectively. The Alliance functioned as part of the University of Oregon until its incorporation as a nonprofit on February 1, 2011. The Alliance has 38 governing members, consisting of colleges and universities in Oregon and Washington, plus the University of Idaho. The Alliance serves many types of libraries in a broader area that includes Oregon, Washington, Idaho, Montana, Utah, Wyoming, Alaska, and Hawaii.

Members