Includes correspondence; reports; speeches; statements and press releases; scrapbooks; clippings; and printed materials, including government documents. Most materials relate to Johnson's career as governor of California, 1911-1917, as U.S. Senator from California, 1917-1945, and to his leadership of the Progressive Party. Material covers various election campaigns; major legislation, both state and national; and the important issues of the period. Some family correspondence also included. Includes correspondence with Francis J. Heney.

Hiram Warren Johnson was born in Sacramento, September 2, 1866, the son of Grove and Annie (De Montfredy) Johnson. He was educated in the Sacramento public schools and attended the University of California at Berkeley. He left in 1886, in his junior year, to marry Minnie L. McNeal. He studied law in his father's law office, was admitted to the bar in 1888, and practiced in Sacramento. In 1894 he and his brother, Albert, managed their father's first congressional campaign. However, they opposed him in his bid for re-election and backed a reform group. The political rivalry estranged father and sons for many years.

Number of containers: 196 boxes, 50 cartons, 6 oversize folders, 5 oversize volumes Number of microfilm reels: 39 Linear feet: 151

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Collection is open for research.