Joseph Lane (1801-1881) was an active Oregonian politician serving as Governor and Oregon's first Senator. The Joseph Lane papers include diaries, correspondence, legal documents, newspaper clippings, a draft of Nina Lane Faubion’s biography of Lane, and photographs.

Charles Linza McNary (1874-1944) was a Republican Senator from Oregon and served as an Oregon Supreme Court associate justice. The collection contains records from McNary's years as Senator that deal with Oregon concerns including correspondence, bills, briefs, and research material about internal improvements, such as rivers and harbors, bridges, state parks railroads, roads, and airports, as well as agriculture, trade, veteran hospitals and a few personal materials and photographs.

Richard Lewis Neuberger (1912-1960), an Oregon native, was a U.S. Senator (D-OR) from 1954 to 1960. The Richard Neuberger collection consists of correspondence, legislation, published articles, and newspaper articles which pertain to the literary and political career of Richard Lewis Neuberger.