# List of United States senators born outside the United States

This is a list of United States senators born outside the United States. It includes senators born in foreign countries (whether to American or foreign parents). The list also includes senators born in territories outside the United States that were later incorporated into the United States (except for those born in the British colonies and territories in North America (or in the temporarily independent former British colonies and territories in North America) that would go on to form the United States of America).
| Name | Birthplace (current country) | Then the territory of | State(s) represented | Party | Years |
| David H. Armstrong | Canada | United Kingdom of Great Britain and Ireland | Missouri | Democratic | 1877–1879 |
| David Baird | United Kingdom | United Kingdom of Great Britain and Ireland | New Jersey | Republican | 1918–1919 |
| Edward Baker | United Kingdom | United Kingdom of Great Britain and Ireland | Oregon | Republican | 1860–1861 |
| James B. Beck | United Kingdom | United Kingdom of Great Britain and Ireland | Kentucky | Democratic | 1877–1890 |
| Judah P. Benjamin | U.S. Virgin Islands | Danish Virgin Islands | Louisiana | Whig | 1853–1859 |
| Judah P. Benjamin | U.S. Virgin Islands | Danish Virgin Islands | Louisiana | Democratic | 1859–1861 |
| Michael Bennet | India | India | Colorado | Democratic | 2009–present |
| Hiram Bingham | United States | Kingdom of Hawaii | Connecticut | Republican | 1924–1933 |
| Rudy Boschwitz | Germany | Weimar Germany | Minnesota | Republican | 1978–1991 |
| Charles Bouligny | United States | Spanish Empire | Louisiana | Democratic-Republican | 1824–1828 |
| Charles Bouligny | United States | Spanish Empire | Louisiana | National Republican | 1828–1829 |
| Pierce Butler | Ireland | Kingdom of Ireland | South Carolina | Pro-Administration | 1789–1791 |
| Pierce Butler | Ireland | Kingdom of Ireland | South Carolina | Anti-Administration | 1791–1795 |
| Pierce Butler | Ireland | Kingdom of Ireland | South Carolina | Democratic-Republican | 1795–1796, 1802–1804 |
| George W. Campbell | United Kingdom | Kingdom of Great Britain | Tennessee | Democratic-Republican | 1811–1814, 1815–1818 |
| Eugene Casserly | Ireland | United Kingdom of Great Britain and Ireland | California | Democratic | 1869–1873 |
| Charles W. Cathcart | Portugal | Kingdom of Portugal | Indiana | Democratic | 1852–1853 |
| John Conness | Ireland | United Kingdom of Great Britain and Ireland | California | Democratic | 1863–1869 |
| James Couzens | Canada | United Kingdom of Great Britain and Ireland | Michigan | Republican | 1922–1936 |
| Ted Cruz | Canada | Canada | Texas | Republican | 2013–present |
| James J. Davis | United Kingdom | United Kingdom of Great Britain and Ireland | Pennsylvania | Republican | 1930–1945 |
| Jean Destréhan | United States | New France | Louisiana | Democratic-Republican | 1812 |
| Tammy Duckworth | Thailand | Thailand | Illinois | Democratic | 2017–present |
| Charles E. Dudley | United Kingdom | Kingdom of Great Britain | New York | Jacksonian Democrat | 1829–1833 |
| James Graham Fair | United Kingdom | United Kingdom of Great Britain and Ireland | Nevada | Democratic | 1881–1887 |
| Eligius Fromentin | France | Kingdom of France | Louisiana | Democratic-Republican | 1813–1819 |
| Albert Gallatin | Switzerland | Republic of Geneva | Pennsylvania | Democratic-Republican | 1793–1794 |
| Jacob Gallinger | Canada | United Kingdom of Great Britain and Ireland | New Hampshire | Republican | 1891–1918 |
| Frank Gooding | United Kingdom | United Kingdom of Great Britain and Ireland | Idaho | Republican | 1921–1928 |
| William Harper | Antigua and Barbuda | United Kingdom of Great Britain and Ireland | South Carolina | Jacksonian Democrat | 1826 |
| S. I. Hayakawa | Canada | Canada | California | Republican | 1977–1983 |
| Felix Hebert | Canada | United Kingdom of Great Britain and Ireland | Rhode Island | Republican | 1929–1935 |
| Mazie Hirono | Japan | Japan | Hawaii | Democratic | 2013–present |
| William Hughes | Ireland | United Kingdom of Great Britain and Ireland | New Jersey | Democratic | 1913–1918 |
| James Jackson | United Kingdom | Kingdom of Great Britain | Georgia | Anti-Administration | 1793–1795 |
| James Jackson | United Kingdom | Kingdom of Great Britain | Georgia | Democratic-Republican | 1801–1806 |
| Magnus Johnson | Sweden | United Kingdoms of Sweden and Norway | Minnesota | Farmer-Labor | 1923–1925 |
| Samuel Johnston | United Kingdom | Kingdom of Great Britain | North Carolina | Pro-Administration | 1789–1793 |
| Charles Jones | Ireland | United Kingdom of Great Britain and Ireland | Florida | Democratic | 1875–1887 |
| John Jones | United Kingdom | United Kingdom of Great Britain and Ireland | Nevada | Republican | 1873–1895 |
| John Jones | United Kingdom | United Kingdom of Great Britain and Ireland | Nevada | Silver | 1895–1901 |
| John Jones | United Kingdom | United Kingdom of Great Britain and Ireland | Nevada | Republican | 1901–1903 |
| Thomas Kearns | Canada | United Kingdom of Great Britain and Ireland | Utah | Republican | 1901–1905 |
| Octaviano Larrazolo | Mexico | Second Federal Republic of Mexico | New Mexico | Republican | 1928–1929 |
| John Laurance | United Kingdom | Kingdom of Great Britain | New York | Federalist | 1796–1800 |
| William Lorimer | United Kingdom | United Kingdom of Great Britain and Ireland | Illinois | Republican | 1909–1912 |
| Walter Lowrie | United Kingdom | Kingdom of Great Britain | Pennsylvania | Democratic-Republican | 1819–1825 |
| Stephen Mallory | Trinidad and Tobago | United Kingdom of Great Britain and Ireland | Florida | Democratic | 1851–1861 |
| Lee Mantle | United Kingdom | United Kingdom of Great Britain and Ireland | Montana | Republican | 1895–1896 |
| Lee Mantle | United Kingdom | United Kingdom of Great Britain and Ireland | Montana | Silver Republican | 1896–1899 |
| Mel Martínez | Cuba | Republic of Cuba | Florida | Republican | 2005–2009 |
| James McMillan | Canada | United Kingdom of Great Britain and Ireland | Michigan | Republican | 1889–1902 |
| Joseph Millard | Canada | United Kingdom of Great Britain and Ireland | Nebraska | Republican | 1901–1907 |
| Bernie Moreno | Colombia | Colombia | Ohio | Republican | 2025–present |
| Robert Morris | United Kingdom | Kingdom of Great Britain | Pennsylvania | Pro-Administration | 1789–1795 |
| John Moses | Norway | United Kingdoms of Sweden and Norway | North Dakota | Democratic | 1945 |
| James E. Murray | Canada | United Kingdom of Great Britain and Ireland | Montana | Democratic | 1934–1961 |
| Knute Nelson | Norway | United Kingdoms of Sweden and Norway | Minnesota | Republican | 1895–1923 |
| James Nesmith | Canada | United Kingdom of Great Britain and Ireland | Oregon | Democratic | 1861–1867 |
| Samuel Nicholson | Canada | United Kingdom of Great Britain and Ireland | Colorado | Republican | 1921–1923 |
| George T. Oliver | United Kingdom | United Kingdom of Great Britain and Ireland | Pennsylvania | Republican | 1909–1917 |
| Samuel Pasco | United Kingdom | United Kingdom of Great Britain and Ireland | Florida | Democratic | 1887–1899 |
| William Paterson | United Kingdom | Kingdom of Ireland | New Jersey | Pro-Administration | 1789–1790 |
| Thomas Patterson | Ireland | United Kingdom of Great Britain and Ireland | Colorado | Democratic | 1901–1907 |
| Alexander Porter | Ireland | United Kingdom of Great Britain and Ireland | Louisiana | Whig | 1833–1837 |
| Edward Robertson | United Kingdom | United Kingdom of Great Britain and Ireland | Wyoming | Republican | 1943–1949 |
| Carl Schurz | Germany | German Confederation | Missouri | Republican | 1869–1870, 1872–1875 |
| Carl Schurz | Germany | German Confederation | Missouri | Liberal Republican | 1870–1872 |
| William Joyce Sewell | Ireland | United Kingdom of Great Britain and Ireland | New Jersey | Republican | 1881–1887, 1895–1901 |
| James Shields | United Kingdom | United Kingdom of Great Britain and Ireland | Illinois | Democratic | 1849–1855 |
| James Shields | United Kingdom | United Kingdom of Great Britain and Ireland | Minnesota | Democratic | 1858–1859 |
| James Shields | United Kingdom | United Kingdom of Great Britain and Ireland | Missouri | Democratic | 1879 |
| Joseph Simon | Germany | Grand Duchy of Hesse | Oregon | Republican | 1898–1903 |
| Pierre Soulé | France | First French Republic | Louisiana | Democratic | 1847, 1849–1853 |
| Isaac Stephenson | Canada | United Kingdom of Great Britain and Ireland | Wisconsin | Republican | 1907–1915 |
| Patrick Joseph Sullivan | Ireland | United Kingdom of Great Britain and Ireland | Wyoming | Republican | 1929–1930 |
| George Sutherland | United Kingdom | United Kingdom of Great Britain and Ireland | Utah | Republican | 1905–1917 |
| Thomas Taggart | Ireland | United Kingdom of Great Britain and Ireland | Indiana | Democratic | 1916 |
| Edward Tiffin | United Kingdom | Kingdom of Great Britain | Ohio | Democratic-Republican | 1807–1809 |
| Chris Van Hollen | Pakistan | Pakistan | Maryland | Democratic | 2017–present |
| Robert Wagner | Germany | Prussia | New York | Democratic | 1927–1949 |
| Patrick Walsh | Ireland | United Kingdom of Great Britain and Ireland | Georgia | Democratic | 1894–1895 |
| Lowell Weicker | France | French Third Republic | Connecticut | Republican | 1971–1989 |
| George Wetmore | United Kingdom | United Kingdom of Great Britain and Ireland | Rhode Island | Republican | 1895–1907, 1908–1913 |
| David Levy Yulee | U.S. Virgin Islands | United Kingdom of Great Britain and Ireland | Florida | Democratic | 1845–1851, 1855–1861 |