The records of Citizens' Environmental Coalition (CEC) document its research and activism, from its infancy as part of the New York Environmental Institute, through its independent chartering in 1991, and continuing into the new millennium.

The Clarence Eugene Hancock Papers document Hancock's time in the House of Representatives in the United States Congress. He was the representative of the 35th District of New York from 1927 to 1945 but came to represent the 36th district from 1945 to 1947 after New York State was redistricted. The collection includes correspondence, newspaper clippings, Congressional bills, transcripts of Congressional hearings, telegrams, and handwritten notes.

The Conference of Large City Boards of Education Records include some of the day-to-day operations of the Special Task Force on Equity and Excellence in Education as documented through files kept by Eugene Samter, Executive Director of the Conference. The collection also includes Samter's testimony from the 1976 Levittown vs. Nyquist case argued before the New York State Supreme Court.

The Conservative Party Of New York State Records contain files created and used the chairmen of the New York State Conservative Party: Kieran O'Doherty, 1962; J. Daniel Mahoney, 1962-86; Serphin Maltese, 1986-88; and Michael R. Long, 1989-2019. The strength of the records is in its documentation of New York State politics and elections (including the State Legislature and other state offices), the Conservative Party's political endorsements and candidates (including writer William F. Buckley, Jr., and Senator James Buckley), and the political goals and ideological positions on contemporary and 20th century issues.

The Daniel Evan Button Papers contain Button's records of his terms as a U.S. Representative of the 29th Congressional District of New York.

This collection documents Equal Justice USA's efforts to abolish capital punishment and reform the criminal justice system nationwide.

The collection consists of correspondence, newspaper clippings and magazine articles, 1938-1973, related to the career of Erich Maria Remarque, a German-born writer most famous for his 1929 work All Quiet on the Western Front.

The Ernest Curto Papers document Curto's service in the New York State Assembly, as a representative of Niagara County (N.Y.), where he served from 1946-1964. The collection includes correspondence, subject files, and legislation from his tenure.

The Ernest I. Hatfield Papers document Hatfield's service in the New York State Senate, where he served from 1948-1964, and the years immediately following. The collection includes correspondence, scrapbooks of newspaper clippings, speeches, and bills he introduced.

This collection is predominantly composed of Ernest van den Haag's publications from 1950-2000, including articles in published form, drafts, and related correspondence.