Senators 20 / 21
Wade Hampton III (1818)
Walker Brooke (1813)
Walter F. George (1878)
Warner Miller (1838)
Warren Austin (1877)
Wayne Allard (1943)
Wayne Morse (1900)
Weldon B. Heyburn (1852)
Wigberto Tañada (1934)
Wilbur F. Sanders (1834)
Wilbur Lucius Cross (1862)
William A. Clark (1839)
William A. Massey (1856)
William A. Wallace (1827)
William Alexander Richardson (1811)
William B. Allison (1829)
William B. McKinley (1856)
William B. Umstead (1895)
William Benton (1900)
William Bingham (1752)
William Blount (1749)
William Borah (1865)
William Bradford (1729)
William C. Preston (1794)
William Crosby Dawson (1798)
William D. Washburn (1831)
William F. Knowland (1908)
William Grayson (1740)
William H. King (1863)
William H. Roane (1787)
William Henry Barnum (1818)
William Hughes (1872)
William Hunter (1774)
William J. McConnell (1839)
William K. Sebastian (1812)
William L. Armstrong (1937)
William L. Dayton (1807)
William L. Scott (1915)
William Luther Hill (1873)
William M. Butler (1861)