This record group is made up of mostly audio and moving images materials, including ¼-inch open audio reels, 16mm film, filmstrips, cassette tapes, VHS tapes, CDs, DVDs, LPs, 3.5 inch floppy disks, and other media, dating from the 1920s up to 2010. The films and audio recordings document Hadassah's efforts to publicize themselves to their members and those outside of Hadassah, by raising awareness of their history, fundraising efforts, and projects in United States and Israel, especially the Hadassah Medical Organization and Youth Aliyah projects and programs. Hadassah also used recordings to document important proceedings, including departmental and board meetings, Midwinter Conferences, and National Conventions.

This Collection consists primarily of English, German, Hebrew, and French language correspondence concerning Reform Judaism, Zionism; the founding of the American Jewish Historical Society; the Jewish Publication Society; B'nai B'rith; the legal position of Jews in England and the United States with particular reference to the Naturalization Acts; the religious and social life and the history of Jews in Russia and Poland; Bible readings in public schools; the study of Jesus in Jewish Sabbath Schools; anti-slavery issues in the Fremont Campaign in 1856; and other correspondence pertaining to his numerous activities.

This record group includes documents created and maintained by the Office of the President, the Office of the Executive Director and the Chair of the Division Coordinators/Directors Committee. Prominent is the Henrietta Szold series, containing correspondence by and to Szold as well as printed materials written by and about her. The files in this record group were created by a national president or executive director, or for their use, or maintained in their office during their years in office. Included are correspondence, minutes, memos, publications, reports and subject files on topics with which these individuals were involved.

The Hadassah Archives documents the activities of Hadassah, the Women's Zionist Organization of America. Founded in 1912, the organization engaged hundreds of thousands of American Jewish women in the Zionist project. Materials include extensive records of its social welfare projects in Palestine and later Israel, such as Youth Aliyah and the Hadassah Medical Organization. Administrative records document the organization's governance, operations, and functions. The collection also includes the papers of Hadassah founder, Henrietta Szold, as well as the organization's national presidents, executive directors, and other important individuals. Additional materials also document Hadassah's organizational activity in the United States such as annual and midwinter conventions and the dozens of active local chapters from all over the United States. Hadassah maintained an active publishing schedule, and the records include hundreds of published newsletters, flyers, and magazines. Other materials include thousands of photographs, extensive audiovisual material, and hundreds of artifacts.

Family papers of the American Sephardic Solis and Cohen families, composed of materials created through circa. 19860, through to the 1930s, with some additional materials prior to and after the time period. Contains correspondence, diaries, journals, medical papers, and eulogies of the family; materials relating to Zionist and Jewish organizations in the United States and abroad; genealogical research and correspondence of several famous Jewish personas; and artifacts, art work and other ephemera.

The collection has been arranged according to the following broad subject areas: personal affairs; speeches, sermons, and articles, both manuscript and published; the Free Synagogue in New York City; the Jewish Institute of Religion; American Jewish affairs; relations between the Jewish and non-Jewish communities; New York City affairs; United States affairs; the press (both Jewish and non-Jewish); world affairs; the American Jewish Congress and World Jewish Congress; refugees; Zionism; Palestine and Israel; arts and letters; and individual corrspondence of a general nature.

The Youth Aliyah Records in the Hadassah Archives document Hadassah's work with multiple international organizations to rescue Jewish children from continental Europe to Palestine from 1933-1945. The collection also documents Hadassah's involvement with Youth Aliyah since 1946 in providing residential, educational, vocational, rehabilitative and therapeutic care for displaced and at-risk youth from around the world.

The material in this record group was culled from Hadassah's Central Files in Israel in the early 1980s to document Hadassah's role in Zionist history. Originally formed from a Zionist women's study group, the first Hadassah chapter in New York had a strong relationship with the Zionist Organization of America (ZOA; then known as the Federation of American Zionists). The material in this record group documents Hadassah's relationship to the ZOA and to other Zionist organizations in the United States, Europe, and Palestine/Israel, particularly in the years leading up to Israeli statehood in 1948. Other subjects addressed in this record group include the founding of Hadassah; World War II, particularly relating to Jewish emigration and refugees; the founding of the United Nations and the debate over recognition of a Jewish state; the partition of Palestine; and Arab-Jewish relations. Included are articles, clippings, convention resolutions, correspondence, diary extracts, memorandums, minutes, press releases, printed ephemera, publications, reports, and speeches.