| Name | Birthplace (current country) | State(s) represented | Party | Years |
| ArmstrongDavidHartley !David H. Armstrong | Canada[lower-alpha 1] | Missouri | Democratic | 1877–1879 |
| BairdDavid !David Baird | Northern Ireland[lower-alpha 2] | New Jersey | Republican | 1918–1919 |
| BakerEdwardDickinson !Edward Baker | England | Oregon | Republican | 1860–1861 |
| BeckJamesBurnie !James B. Beck | Scotland | Kentucky | Democratic | 1877–1890 |
| BenjaminJudahPhilip !Judah P. Benjamin | U.S. Virgin Islands[lower-alpha 3] | Louisiana | Whig | 1853–1859 |
| Democratic | 1859–1861 |
| BennetMichael !Michael Bennet | India | Colorado | Democratic | 2009–present |
| BoschwitzRudolphEly !Rudy Boschwitz | Germany | Minnesota | Republican | 1978–1991 |
| ButlerPierce !Pierce Butler | Ireland | South Carolina | Pro-Administration | 1789–1791 |
| Anti-Administration | 1791–1795 |
| Democratic-Republican | 1795–1796, 1802–1804 |
| Campbell, George W.George W. Campbell | Scotland | Tennessee | Democratic-Republican | 1811–1814, 1815–1818 |
| CasserlyEugene !Eugene Casserly | Ireland | California | Democratic | 1869–1873 |
| ConnessJohn !John Conness | Ireland | California | Democratic | 1863–1869 |
| CouzensJames !James Couzens | Canada | Michigan | Republican | 1922–1936 |
| Cruz !Ted Cruz | Canada | Texas | Republican | 2013 - Present |
| DavisJamsJohn !James J. Davis | Wales | Pennsylvania | Republican | 1930–1945 |
| DudleyCharlesEdward !Charles E. Dudley | England | New York | Jacksonian Democrat | 1829–1833 |
| FairJamesGraham !James Graham Fair | Northern Ireland[lower-alpha 2] | Nevada | Democratic | 1881–1887 |
| FromentinEligius !Eligius Fromentin | France | Louisiana | Democratic-Republican | 1813–1819 |
| Gallatin !Albert Gallatin | Switzerland | Pennsylvania | Democratic-Republican | 1793–1794[lower-alpha 4] |
| GallingerJacobHarold !Jacob Harold Gallinger | Canada[lower-alpha 5] | New Hampshire | Republican | 1891–1918 |
| GoodingFrankRobert !Frank R. Gooding | England | Idaho | Republican | 1921–1928 |
| HarperWilliam !William Harper | Antigua and Barbuda[lower-alpha 6] | South Carolina | Jacksonian Democrat | 1826 |
| HayakawaSam !Sam Hayakawa | Canada | California | Republican | 1977–1983 |
| HironoMazie !Mazie Hirono | Japan | Hawaii | Democratic | 2013–present |
| HughesWilliamJohn !William Hughes | Ireland | New Jersey | Democratic | 1913–1918 |
| JacksonJames !James Jackson | England | Georgia | Anti-Administration | 1793–1795 |
| Democratic-Republican | 1801–1806 |
| JohnsonMagnus !Magnus Johnson | Sweden | Minnesota | Farmer-Labor | 1923–1925 |
| JonesCharlesWilliam !Charles W. Jones | Ireland | Florida | Democratic | 1875–1887 |
| JonesJohnPercival !John P. Jones | Ireland | Florida | Democratic | 1873–1903 |
| JonesCharlesWilliam !Charles W. Jones | England | Nevada | Republican | 1873–1895 |
| Silver | 1895–1901 |
| KearnsThomas !Thomas Kearns | Canada | Utah | Republican | 1901–1905 |
| LarrazoloOctavianoAmbrosio !Octaviano Larrazolo | Mexico | New Mexico | Republican | 1928–1929 |
| LauranceJohn !John Laurance | England | New York | Federalist | 1796–1800 |
| LorimerWilliam !William Lorimer | England | Illinois | Republican | 1909–1912 |
| LowrieWalter !Walter Lowrie | Scotland | Pennsylvania | Democratic-Republican | 1819–1825 |
| MalloryStephenRussell !Stephen Mallory | Trinidad and Tobago[lower-alpha 7] | Florida | Democratic | 1851–1861 |
| MantleLee !Lee Mantle | England | Montana | Republican | 1895–1899 |
| MartinezMel !Mel Martinez | Cuba | Florida | Republican | 2005–2009 |
| McCainJohn !John McCain | Panama[lower-alpha 8] | Arizona | Republican | 1987–present |
| McMillanJames !James McMillan | Canada[lower-alpha 5] | Michigan | Republican | 1889–1902 |
| MillardJosephHopkins !Joseph Millard | Canada[lower-alpha 5] | Nebraska | Republican | 1901–1907 |
| MorrisRobert !Robert Morris | England | Pennsylvania | Pro-Administration | 1789–1795 |
| MosesJohn !John Moses | Norway | North Dakota | Democratic | 1945 |
| NelsonKnute !Knute Nelson | Norway | Minnesota | Republican | 1895–1923 |
| NicholsonSamuelDanford !Samuel D. Nicholson | Canada[lower-alpha 9] | Colorado | Republican | 1921–1923 |
| PascoSamuel !Samuel Pasco | England | Florida | Democratic | 1887–1899 |
| PatersonWilliam !William Paterson | Northern Ireland[lower-alpha 2] | New Jersey | Pro-Administration | 1789–90 |
| PattersonThomasMacDonald !Thomas M. Patterson | Ireland | Colorado | Democratic | 1901–1907 |
| PorterAlexander !Alexander Porter | Ireland | Louisiana | Whig | 1833–1837 |
| RobertsonEdwardVivian !Edward V. Robertson | Wales | Wyoming | Republican | 1943–1947 |
| SchurzCarl !Carl Schurz | Germany[lower-alpha 10] | Missouri | Republican | 1869–1875 |
| Sewell, William JoyceWilliam Joyce Sewell | Ireland | New Jersey | Republican | 1881–1887, 1895–1901 |
| Shields, JamesJames Shields | Northern Ireland | Illinois Minnesota Missouri | Democratic | 1849–1855 1858–1859 1879 |
| Simon, JosephJoseph Simon | Germany[lower-alpha 11] | Oregon | Republican | 1898–1903 |
| Soulé, PierrePierre Soulé | France | Louisiana | Republican | 1847, 1849–1853 |
| Stephenson, IsaacIsaac Stephenson | Canada[lower-alpha 12] | Wisconsin | Republican | 1907–1915 |
| Sullivan, Patrick JosephPatrick Joseph Sullivan | Ireland | Wyoming | Republican | 1929–1930 |
| Sutherland, GeorgeGeorge Sutherland | England | Utah | Republican | 1905–1917 |
| Taggart, ThomasThomas Taggart | Ireland | Indiana | Democratic | 1916 |
| Tiffin, EdwardEdward Tiffin | England | Ohio | Democratic-Republican | 1807–1809 |
| Wagner, Robert FerdinandRobert Ferdinand Wagner | Germany | New York | Democratic | 1927–1949 |
| Walsh, PatrickPatrick Walsh | Ireland | Georgia | Democratic | 1894–1895 |
| Yulee, David LevyDavid Levy Yulee | U.S. Virgin Islands[lower-alpha 13] | Florida | Democratic | 1845–1851, 1855–1861 |