| 1 | Maps and Plans Collection | XVII-XXw | 100 | |
| 2 | Charles Burke Memorial Collection (of photographs) | 1914-2000 | 108 | 0.5 |
| 3 | Democratic Opposition Movement in Poland | (1948)1963-1990 | 375 | 4.7 |
| 4 | Feliks Gross Papers | 1926-2002(2003) | 501 | 9.1 |
| 5 | Jan Lechon Papers | 1938-1956(2006) | 173 | 2.78 |
| 6 | Aleksander Lednicki Papers | (1881)1900-1932(1962) | 74 | 1.02 |
| 7 | Waclaw Lednicki Papers | (1936)1940-1967 | 342 | 5.8 |
| 8 | Feliks Mantel Papers | 1940-1982 | 25 | 0.66 |
| 9 | Karol Popiel Political Papers | (1919)1940-1977(1982) | 391 | 7.04 |
| 10 | Potocki Family Papers | 1505-1958 | 2846 | 10.9 |
| 11 | Jerzy Ptakowski Papers | (1917)1928-1983 | 427 | 5.8 |
| 12 | Polish Embassy in the USA | (1918)1919-1945(1947) | 128 | 1.9 |
| 13 | Polish Legation in Rio de Janeiro | 1918-1945(1952) | 668 | 8.1 |
| 14 | Tadeusz Sulkowski Papers | 1940-1960(1980) | 10 | 0.25 |
| 15 | Edmund Stefan Urbanski Papers | (1906)1940-1994 | 387 | 3.75 |
| 16 | Zygmunt Zaremba Papers | 1934-1988(1996) | 71 | 1.8 |
| 17 | Polish Institute of Arts and Sciences of America | 1942-2006 | 1817 | 24.4 |
| 18 | Polish Institute of Arts and Sciences of America. Microfilm Collection | (1907)1953-1987 | 290 | |
| 19 | Polish Institute of Arts and Sciences of America. Oral History | 1919-1986 | 100 | |
| 20 | Polish Federalist Association, Division in Chicago | 1950-1955(1972) | 7 | 0.08 |
| 21 | Szczepan Karol Zimmer Papers | 1976-1985 | 8 | 0.08 |
| 22 | Polish Freedom Movement "Independence and Democracy" in New York | 1944-1957(1985) | 20 | 0.35 |
| 23 | Leon Sliwinski Papers | (1942)1967-1985(1992) | 8 | 0.09 |
| 24 | Zygmunt Tebinka Papers | 1939-1944 | 4 | 0.08 |
| 25 | Lech Yejeski Papers | (1938)1946-1964(1993) | 5 | 0.08 |
| 26 | Lucja Marecka-Borski Papers | (1936)1943-1986 | 13 | 0.25 |
| 27 | Jozef and Halina Wittlin Papers | 1957-1959(1967) | 2 | 0.08 |
| 28 | Waclaw Solski Papers | 1941-1980 | 23 | 0.42 |
| 29 | Bohdan Pawlowicz Papers | (1927)1931-1967(1968) | 37 | 0.42 |
| 30 | Polish American Congress Inc. Commission of Education | (1982)1986-2000 | 41 | 0.7 |
| 31 | Kazimierz Wierzynski Papers | (1938)1953-1959(1984) | 7 | 0.16 |
| 32 | Nicolai Berezowsky Papers | (1929)1933-1953 | 24 | 0.25 |
| 33 | Juan Wyskota-Zakrzewski Papers | 1930-1982(1983) | 19 | 0.38 |
| 34 | Jozef Lipski Papers | 1940-1958 | 4 | 0.08 |
| 35 | Rudzinski Family Papers | (1940)1946-1994 | 20 | 0.2 |
| 36 | Radio Free Europe | (1946)1951-1989 | 297 | 8.01 |
| 37 | Polish Military Technical Institute in London | (1933)1941-1945(1950) | 40 | 0.35 |
| 38 | Paul Super Papers | (1917)1932-1949(1960) | 37 | 0.35 |
| 39 | Ludwika Ciechanowiecka Papers | (1881)1938-1983 | 31 | 0.53 |
| 40 | Frank Renkiewicz Papers | (1904)1920-1993 | 449 | 7.5 |
| 41 | Ludomira Markiewicz Collection | 1935-2000 | 122 | 1.5 |
| 42 | Frank B. Roman Papers | (1901)1920-1985 | 97 | 1.6 |
| 43 | Marguerite Merington Papers | (1891)1923-1946 | 26 | 0.25 |
| 44 | Tadeusz Cieplak Papers | (1939)1951-1999 | 23 | 0.36 |
| 45 | Andrzej Bobkowski Papers | 1938-1961(1981) | 47 | 0.45 |
| 46 | Sigismund Stojowski Papers | 1918-1946(1979) | 58 | 0.42 |
| 47 | Franciszek Orlowicz Papers | 1945-1967(1984) | 13 | 0.18 |
| 48 | Gutowski Family Papers | 1932-1957(1974) | 27 | 0.26 |
| 49 | Ludwik Krzyzanowski Papers | 1925-1986(2003) | 217 | 2.95 |
| 50 | Oskar Halecki Papers | 1904-1976 | 152 | 1.25 |
| 51 | Paul Supinski Papers | 1918-1950 | 8 | 0.08 |
| 52 | Jan Wszelaki Papers | 1940-1948(1964) | 64 | 1.2 |
| 53 | Polish Press Agency in Edinburgh | (1939)1945-1951 | 100 | 1.5 |
| 54 | F.D. Sands Papers | 1945-1949 | 5 | 0.12 |
| 55 | Bronislaw Dembinski Papers | 1882-1937(1946) | 4 | 0.08 |
| 56 | Mieczyslaw Horszowski Papers | 1946-1954;1960-1968 | 2 | 0.08 |
| 57 | Frank Przetacznik Papers | 1958-2000 | 150 | 2 |
| 58 | Wlodzimierz Drzewieniecki Collection | (1918)1944-2000(2006) | 13 | 0.35 |
| 59 | George Szumski Manuscript Collection | 1701-1834 | 3 | 0.08 |
| 60 | Sybiracy. The Assembly of Representatives of Polish American Organizations, Press, Radio and Television of the New York Metropolitan Area | 1995-2000 | 16 | 0.16 |
| 61 | Polish American Relief Committee in New York | 1914-1917 | 2 | 0.08 |
| 62 | Polish American and Austrian Frendship Committee in New York | 1982-1984 | 9 | 0.16 |
| 63 | Polish American Academic Association in the USA | 1960-1963 | 1 | 0.08 |
| 64 | Roman Dmowski Institute in New York | (1954)1961-2000(2001) | 13 | 0.16 |
| 65 | Polish Association of Former Political Prisoners in New York | (1947)1952-1982 | 17 | 0.24 |
| 66 | Urząd Rady Ministrów Polskiej Rzeczypospolitej Ludowej | 1944-1989 | 108 | |
| 67 | Thaddeus Gromada Papers | (1935)1942-2004 | 179 | 1.81 |
| 68 | Polonia Technica. Association of Polish-American Engineers | 1941-2004 | 161 | 2.1 |
| 69 | Waclaw Hilary Bninski Papers | 1929-1998(1999-2002) | 246 | 2.6 |
| 70 | Roman Michalowski Papers | 1928-1968 | 38 | 0.4 |
| 71 | Jadwiga Irena Daniec Papers | 1939-2007 | 10 | 0.1 |
| 72 | Piotr Pawel Yolles Papers | 1926-1958 | 10 | 0.12 |
| 73 | "The Tatra Eagel" Publishing House | 1979-1996 | 1 | 0,1 |
| 74 | Collection Regarding Ignacy Jan Paderewski | 1958-1960 | 7 | 0.05 |
| 75 | Sound Archives and Oral History Collection | 1923-1992 | 454 | 2.13 |
| 76 | Joseph S. Wardzala Collection | 1991 | 70 | 1.88 |
| 77 | Stanisława and Otton Nikodym Papers | 1895-1988, | 26 | 0.76 |
