| Mario Uchard | 1824–1893 | 1 |
| Nicholas Udall | 1505–1556 | 1 |
| Frederike van Uildriks | 1854–1919 | 2 |
| Louis Ulbach | 1822–1889 | 2 |
| Harlan Ullman | born 1941 | 1 |
| G. W. (George Wallace) Umphrey | born 1878 | 1 |
| Miguel de Unamuno | 1864–1936 | 1 |
| Evelyn Underhill | 1875–1941 | 3 |
| Clarence F. Underwood | 1871–1929 | 4 |
| Jean Starr Untermeyer | 1886–1970 | — |
| Louis Untermeyer | 1885–1977 | — |
| Oskar Uotila | 1853–1903 | 1 |
| Charles Wentworth Upham | 1802–1875 | 1 |
| Goswin Uphues | 1841–1916 | 1 |
| Bertha Upton | 1849–1912 | 1 |
| Florence K. (Florence Kate) Upton | 1873–1922 | 1 |
| George P. (George Putnam) Upton | 1834–1919 | 3 |
| Urquhart, Thomas, Sir | 1611–1660 | 6 |
| Octave Uzanne | 1851–1931 | 2 |