Wikisource:Authors-U

Ud

 * Udržal, František (1866–1938)

Uf

 * Ufford, Edwin Smith (1851–1929)

Uh

 * Uhland, Ludwig (1787–1862)

Uj

 * Ujević, Tin (1891–1955)

Uk

 * Ukon (10th cent.)
 * Ukrainka, Lesya (1871–1913)

Ul

 * Ule, Otto (1820–1876)
 * Ulrici, Hermann (1806–1884)

Un

 * Ungern-Sternberg, Peter Alexander von (1806–1868)
 * Underhill, Evelyn (1875–1941)
 * Underhill, John Garrett (1876–1946)
 * Underwood, Lucien Marcus (1853–1907)
 * Untermeyer, Louis (1885–1977)
 * Unwin, William (1838–1933)

Up

 * Upham, Thomas Cogswell (1799–1872)
 * Uprka, Joža (1861–1940)
 * Upshur, Abel Parker (1790–1844)

Ur

 * d'Urban, William Stewart Mitchell (1836–1934)
 * Ure Smith, Sydney George (1887–1949)
 * von Urlichs, Karl Ludwig (1813–1889)
 * Urquhart, Alexander Reid (1852–1917)
 * Urquhart, Thomas (1611–c. 1660)
 * Urwick, William (1826–1905)

Us

 * Usk, Thomas (?–1388)
 * Usher, Roland Greene (1880–?)
 * Ussher, James (1581–1656)

Ut

 * Utterson, Sarah Elizabeth (1781–1851)

Uy

 * Sadakazu Uyenishi (1880–)

Uz

 * Uzanne, Octave (1852–1931)

Other

 * United Nations Verification Mission in Guatemala (MINUGUA)
 * U.S. Air Force
 * U.S. Army
 * U.S. Congress
 * U.S. Copyright Office
 * U.S. Court of Appeals for the D.C. Circuit
 * U.S. Court of Appeals for the First Circuit
 * U.S. Court of Appeals for the Second Circuit
 * U.S. Court of Appeals for the Third Circuit
 * U.S. Court of Appeals for the Fourth Circuit
 * U.S. Court of Appeals for the Fifth Circuit
 * U.S. Court of Appeals for the Sixth Circuit
 * U.S. Court of Appeals for the Seventh Circuit
 * U.S. Court of Appeals for the Eighth Circuit
 * U.S. Court of Appeals for the Tenth Circuit
 * U.S. Court of Appeals for the Eleventh Circuit
 * U.S. Dept. of Defense
 * U.S. Dept. of Labor
 * U.S. Dept. of State
 * U.S. House of Representatives