The Los Angeles Newspaper Guild (LANG) Collection documents the history, development, and accomplishments of the union. The materials span the greater part of the organization's existence, dating from 1932 to 2000. The majority of the collection consists of LANG administrative records, correspondence, legal documents, and a variety of publications. A significant portion of the collection deals specifically with union organizing activities and collective bargaining. The collection is particularly strong in its coverage of the 1967-1973 Los Angeles Herald-Examiner strike. It has been divided into three major series: American Newspaper Guild Files (1931-1973), Administrative Files (1936-2000), and Union Activity Files (1942-1996).

Series I, American Newspaper Guild Files, documents the national Guild’s work both before and after the incorporation of the Los Angeles local chapter. The series includes information on arbitration, financial information, collective bargaining, union membership, and the 1939 Hearst Strike, and includes bulletins, correspondence, and contracts. The series is filed chronologically.

Series II, Administrative Files, consists of the operating files of the union. Prior to 1957, both administrative and union activity materials were filed together, and that organization has been left intact. For collective bargaining after 1957, see Series III, subseries B. The series consists of five subseries: Early Files (1936-1998), Office Files (1957-2000), Bulletins (1971-1985), Published Contracts (1947-1997), and Media (1988-1998). The Early Files document the LANG's efforts at unionizing newspaper employees as well as their efforts on behalf of these employees, including election material, collective bargaining, and strikes and lockouts. Files include correspondence, newsletters, clippings, and meeting minutes. These materials are filed chronologically. The Office Files documents the LANG's operations, and include financial records, insurance information, meeting agendas and minutes, and materials documenting associated unions. The subseries is filed chronologically. The Bulletins consist of official LANG Bulletins and are filed chronologically. The Published Contracts consist of published pamphlets documenting by-laws, contract agreements, convention proceedings, and retirement plans. These pamphlets are filed chronologically. Media documents convention proceedings, organizing, and strikes. This subseries consists of audio and video and is filed alphabetically by title.

Series III, Union Activity Files, documents LANG's work organizing newspaper employees throughout the Greater Los Angeles region, and their efforts at collective bargaining on their behalf. It has been divided into two subseries: Organizing Files (1949-1996) and Negotiation and Collective Bargaining Files (1942-1992). The Organizing Files include documentation of LANG's work chartering chapters, and includes correspondence, petitions, and election materials. It is filed chronologically. The Negotiation and Collective Bargaining Files include documentation of LANG's work on behalf of employees at numerous newspapers and newspaper publishers in Greater Los Angeles, including the Herald-Examiner (which includes the Evening Herald & Express, the Examiner), Hollywood Citizen-News, and the Orange County Evening News (previously the Garden Grove Daily News)among others. It includes correspondence, flyers, election materials, contract, meeting minutes, photographs, and clippings. The series includes extensive coverage of the 1967-1973 Herald-Examiner strike and other contract negotiation attempts. Materials are filed in sub-subseries according to newspaper title and chronologically within each. For collective bargaining prior to 1957, see Series II, subseries A.