- Junior High School 141 (Bronx, New York, N.Y.)1
- Junior High School 189 (Queens, New York, N.Y.)1
- Junior High School 234 (Brooklyn, New York, N.Y.)1
- Junior High School 285 (Brooklyn, New York, N.Y.)1
- Junior High School 79 (Bronx, New York, N.Y.)1
- Junior High School 98 (Bronx, New York, N.Y.)1
- Karađorđe, 1768?-18171
- Karsavina, Tamara1
- Kavo, Yonah1
- Kay, Ulysses, 1917-199546
- Kellogg, Paul Underwood, 1879-19581
- Kemble, Fanny, 1809-18931
- Kennedy, John F. (John Fitzgerald), 1917-19631
- Khuwārizmī, Muḥammad ibn Mūsá, active 813-8461
- King, Alexander, 1900-19651
- King, Charles, 1789-18671
- King’s College (New York, N.Y.)1
- Koo, V. K. Wellington, 1888-19851
- Koshko, A. F. (Arkadiĭ Frant︠s︡evich), 1867-1928 or 19291
- Kotzebue1
- Lacordaire High School (Montclair, N.J.)7
- Ladycliff Academy (Highland Falls, N.Y.)12
- Lafayette High School (Brooklyn, New York, N.Y.)1
- Landucci, Bernardino, -15231
- Latini, Brunetto, 1220-12951
- Lattes, Abraham ben Isaac, 1809-18751
- Lawrence High School (Cedarhurst, N.Y.)1
- Le Bouvier, Gilles, 1386-approximately 14571
- Lee, Manfred B. (Manfred Bennington), 1905-19711
- Lehman, Herbert H.53
- Lehman, Herbert H. (Herbert Henry), 1878-1963198
- Lehman, Herbert H., Mrs.4
- Lehman, Irving and Mrs. Sissie Straus2
- Lehman, Mayer, 1830-18975
- Leon, Yitsḥaḳ ben Daṿid1
- Levin, Ẓevi Hirsch ben Aryeh Loeb, 1721-18001
- Leṿi, Avraham1
- Leṿi, Moshe ben Eliyahu, ha-Yerushalmi1
- Lewis, Harold Miller, 1893-19781
- Lewis, Priscilla G.1
- Lewisohn, Adolph, 1849-19382
- Liberty (Steam yacht)2
- Liberty Hall (Harlem, New York, N.Y.)1
- Liberty League of Negro-Americans (New York, N.Y.)1
- Lieb, Hirsh1
- Lincoln High School (Jersey City, N.J.)6
- Lincoln, Abraham, 1809-18653
- Lindenhurst Senior High (Lindenhurst, N.Y.)1
- Lipsky, Louis, 1876-19631
- Lissim, Simon, 1900-19812
- Loewe, Louis, 1809-18881
- Lopis, Yitsḥaḳ1
- Louis Pasteur Junior High School 67 (Queens, New York, N.Y.)2
- Luria, Isaac ben Solomon, 1534-15721
- Luria, Solomon ben Jehiel, 1510?-1573 or 15741
- Luther, Martin, 1483-15461
- Luzzatto, Samuel David, 1800-18651
- Lynbrook Senior High School (Lynbrook, N.Y.)1
- MacArthur High School (Levittown, N.Y.)1
- MacDowell, Edward, 1860-19081