Includes the constitution and by-laws of the Association, historical sketches of the Hampshire YMCA completed in 1952 and 1969 by Errol Ridgwell, and minutes of the Board of Directors, the Annual Meeting, and the Ladies' Auxiliary. The early Board and Annual Meeting minutes are combined in a single volume (1891-1909), followed by relatively complete separate runs through 1978.

The reports are arranged chronologically by year for each category.

Comprised of the reports of officers and various YMCA committees and departments. For a typical year, the committee and department reports include the Membership, House, and Camp committees, and the Boys', Businessmen's, Women's, and Activity Departments. The bulk of the officers' reports originate from the monthly reports of the general secretary, but some reports from other officers or professional staff are included. These reports are particularly thorough for the years 1935 to 1970. A third sequence is comprised of the financial committee's monthly statements and reports. For the years 1937 to 1970, there also exist published annual reports of the Association's programs and activities.

Consists largely of the correspondence of the Executive Board or the General Secretary, concentrated primarily between the years 1930 and 1960. Most of the letters reflect routine YMCA business, but some highlight the social and cultural ideas which influenced or shaped YMCA policies.

Alphabetically arranged by topic.

Includes correspondence, newsletters, publications, and information about the variety of programs implemented by the Hampshire YMCA, including social action as well as recreational, cultural, and club activities, especially during the 1940s and 1950s. The files also include material about building campaigns, funding agencies, properties, and the proposed merger with the People's Institute.

Contains early financial ledgers (1912-1921), miscellaneous YMCA publications and newsletters (1945-1960), and several scrapbooks documenting the 1920s, World War II, the 1965 building campaign, and the long career of Errol V. Ridgwell.