Senators 13 / 21
Josiah Bailey (1873)
Juan Francisco Giró (1791)
Juan Lozano Ramírez (1964)
Juan Miguel Zubiri (1968)
Juanita Amatong (1935)
Judah Dana (1772)
Judd Gregg (1947)
Julio Miranda (1946)
Julius C. Burrows (1837)
Justin Smith Morrill (1810)
Kaneaster Hodges Jr. (1938)
Kathleen A. Blatz (1954)
Kay Hagan (1953)
Kenneth McKellar (1869)
Key Pittman (1872)
Kirsten Gillibrand (1966)
Kirtland I. Perky (1867)
Kit Bond (1939)
LaFayette Emmett (1822)
Lafayette S. Foster (1806)
Lamar Alexander (1940)
Larry Craig (1945)
Lauch Faircloth (1928)
Lawrence Brainerd (1794)
Lawrence C. Phipps (1862)
Lawrence Tyson (1861)
Lee Metcalf (1911)
Lee Slater Overman (1854)
Leonard B. Jordan (1899)
Leonard Wilcox (1799)
Lester C. Hunt (1892)
Leverett Saltonstall (1892)
Levi Ankeny (1844)
Lindsey Graham (1955)
Littleton Waller Tazewell (1774)
Lorenzo Latorre (1844)