The Montana Chamber of Commerce was founded as Montanans, Inc. in 1931 to promote business and professional interests and industrial development. The name was changed in 1946. Records (1931-1967) include general correspondence, financial records, legal documents, minutes, news releases, organizational records, printed materials, reports, speeches, subject files, and miscellany.

Records of the Governors of Montana consist of legislative files (1893-1935), including correspondence, bills, vetos, governors messages, petitions, etc.; general correspondence (1902-1962) for individual administrations; and subject files (1889-1962) arranged by state agency and topic.