| Representative | Country/place of birth | Citizenship by | Party | Position(s) held |
|---|
| John J. Adams |  New Brunswick | Unknown | Democratic | U.S. Representative from New York |
| Victor Anfuso |  Italy | Unknown | Democratic | U.S. Representative from New York |
| Henry M. Arens |  Germany | Derivation | Farmer-Labor | U.S. Representative from Minnesota |
| William Armstrong |  Ireland | Unknown | Democratic-Republican | U.S. Representative from Virginia |
| Chester G. Atkins |  Switzerland | Birth | Democratic | U.S. Representative from Massachusetts |
| Robert Baker |  England | Unknown | Democratic | U.S. Representative from New York |
| Ron Barber | England | Birth | Democratic | U.S. Representative from Arizona |
| Samuel Fleming Barr |  Ireland | Unknown | Republican | U.S. Representative from Pennsylvania |
| William Bernard Barry |  Ireland | Unknown | Democratic | U.S. Representative from New York |
| Richard Bartholdt |  Principality of Reuss-Gera | Unknown | Republican | U.S. Representative from Missouri |
| Charles Barwig |  Hesse | Unknown | Democratic | U.S. Representative from Wisconsin |
| William Beatty | Ireland | Unknown | Democratic | U.S. Representative from Pennsylvania |
| James Burnie Beck |  Scotland | Unknown | Democratic | U.S. Representative from Kentucky |
| Carlos Bee |  Mexico | Birth | Democratic | U.S. Representative from Texas |
| Andrew Beirne | Ireland | Unknown | Jeffersonian Republican | U.S. Representative from Virginia |
| Victor L. Berger |  Austria | Naturalization | Socialist | U.S. Representative from Wisconsin |
| John Bernard |  France | Derivation | Farmer-Labor | U.S. Representative from Minnesota |
| Charles Gustav Binderup |  Denmark | Unknown | Democratic | U.S. Representative from Nebraska |
| Haldor Boen |  Norway | Derivation | Populist | U.S. Representative from Minnesota |
| Azariah Boody |  Lower Canada | Unknown | Whig | U.S. Representative from New York |
| Thomas W. Bradley | England | Unknown | Republican | U.S. Representative from New York |
| Edward Breitung |  Saxe-Meiningen | Unknown | Republican | U.S. Representative from Michigan |
| Robert G. Bremner | Scotland | Unknown | Democratic | U.S. Representative from New Jersey |
| George H. Brickner |  Bavaria | Unknown | Democratic | U.S. Representative from Wisconsin |
| James Frankland Briggs | England | Unknown | Republican | U.S. Representative from New Hampshire |
| Henry Bristow |  Azores | Unknown | Republican | U.S. Representative from New York |
| John W. Brown | Scotland | Derivation | Jacksonian | U.S. Representative from New York |
| Hugh Buchanan | Scotland | Unknown | Democratic | U.S. Representative from Georgia |
| Charles F. Buck |  Baden | Unknown | Democratic | U.S. Representative from Louisiana |
| Samuel Swinfin Burdett | England | Unknown | Republican | U.S. Representative from Missouri |
| Henry Burk |  Württemberg | Unknown | Republican | U.S. Representative from Pennsylvania |
| Aedanus Burke | Ireland | Derivation | Anti-Administration | U.S. Representative from South Carolina |
| William J. Burke | England | Unknown | Republican | U.S. Representative from Pennsylvania |
| George Burnham | England | Unknown | Republican | U.S. Representative from California |
| Thomas Burnside | Ireland | Derivation | Democratic-Republican | U.S. Representative from Pennsylvania |
| Joseph Henry Burrows | England | Derivation | Greenback | U.S. Representative from Missouri |
| Sala Burton |  Poland | Unknown | Democratic | U.S. Representative from California |
| Thompson Campbell | Ireland | Unknown | Democratic | U.S. Representative from Illinois |
| Timothy J. Campbell | Ireland | Unknown | Democratic | U.S. Representative from New York |
| Joseph Cao |  South Vietnam | Naturalization | Republican | U.S. Representative from Louisiana |
| Louis Capozzoli | Italy | Unknown | Democratic | U.S. Representative from New York |
| Patrick J. Carley | Ireland | Unknown | Democratic | U.S. Representative from New York |
| Peter Angelo Cavicchia | Italy | Unknown | Republican | U.S. Representative from New Jersey |
| William B. Charles | Scotland | Unknown | Republican | U.S. Representative from New York |
| John Michael Clancy | Ireland | Unknown | Democratic | U.S. Representative from New York |
| William Bourke Cockran | Ireland | Naturalization | Democratic | U.S. Representative from New York |
| Patrick Collins | Ireland | Derivation | Democratic | U.S. Representative from Massachusetts |
| James Cooney | Ireland | Unknown | Democratic | U.S. Representative from Missouri |
| John G. Cooper | England | Naturalization | Republican | U.S. Representative from Ohio |
| Hector Craig | Scotland | Unknown | Jacksonian | U.S. Representative from New York |
| William Crawford | Scotland | Naturalization | Democratic-Republican | U.S. Representative from Pennsylvania |
| Thomas J. Creamer | Ireland | Unknown | Democratic | U.S. Representative from New York |
| Charles Frederick Crisp | England | Unknown | Democratic | U.S. Representative from Georgia |
| Robert Crosser | Scotland | Unknown | Democratic | U.S. Representative from Ohio |
| Frank Crowther | England | Unknown | Republican | U.S. Representative from New York |
| George Calhoun Crowther | England | Unknown | Republican | U.S. Representative from Missouri |
| William Cullen | Ireland | Unknown | Republican | U.S. Representative from Illinois |
| Thomas Cusack | Ireland | Unknown | Democratic | U.S. Representative from Illinois |
| Geoff Davis |  Canada | Birth | Republican | U.S. Representative from Kentucky |
| Robert T. Davis | Ireland | Unknown | Republican | U.S. Representative from Massachusetts |
| Benjamin Dean | England | Derivation | Democratic | U.S. Representative from Massachusetts |
| Steven Derounian |  Bulgaria | Unknown | Republican | U.S. Representative from New York |
| Lincoln Díaz-Balart |  Cuba | Naturalization | Republican | U.S. Representative from Florida |
| Samuel Dickstein |  Russia | Unknown | Democratic | U.S. Representative from New York |
| Michael Donohoe | Ireland | Derivation | Democratic | U.S. Representative from Pennsylvania |
| Mervyn Dymally |  Trinidad and Tobago | Derivation | Democratic | U.S. Representative from California |
| Charles Aubrey Eaton |  Canada | Unknown | Republican | U.S. Representative from New Jersey |
| John Ewing | Ireland | Derivation | Multiple | U.S. Representative from Indiana |
| Jacob Falconer |  Canada | Derivation | Progressive | U.S. Representative from Washington |
| Michael F. Farley | Ireland | Derivation | Democratic | U.S. Representative from New York |
| William Findley | Ireland | Unknown | Multiple | U.S. Representative from Pennsylvania |
| John F. Finerty | Ireland | Derivation | Independent Democratic | U.S. Representative from Illinois |
| Gustavus A. Finkelnburg |  Prussia | Derivation | Multiple | U.S. Representative from Missouri |
| Mayra Flores |  Mexico | Naturalization | Republican | U.S. Representative from Texas |
| Nicholas Ford | Ireland | Derivation | Greenback | U.S. Representative from Missouri |
| Elizabeth Furse |  Kenya | Derivation | Democratic | U.S. Representative from Oregon |
| Albert Gallatin |  Geneva | Unknown | Democratic-Republican | U.S. Representative from Pennsylvania |
| Bernard J. Gehrmann | Germany | Derivation | Progressive | U.S. Representative from Wisconsin |
| Sam Gejdenson |  Germany | Unknown | Democratic | U.S. Representative from Connecticut |
| James Gillespie | Ireland | Unknown | Multiple | U.S. Representative from North Carolina |
| George W. Gillie | Scotland | Unknown | Republican | U.S. Representative from Indiana |
| Martin Gorski |  Poland | Unknown | Democratic | U.S. Representative from Illinois |
| James McMahon Graham | Ireland | Derivation | Democratic | U.S. Representative from Illinois |
| Ernest Greenwood | England | Unknown | Democratic | U.S. Representative from New York |
| John Greig | Scotland | Naturalization | Whig | U.S. Representative from New York |
| James Gunn | Ireland | Derivation | Populist | U.S. Representative from Idaho |
| Michael Hahn | Bavaria | Derivation | Multiple | U.S. Representative from Louisiana |
| Kittel Halvorson | Norway | Derivation | Populist | U.S. Representative from Minnesota |
| Alexander M. Hardy | Upper Canada | Unknown | Republican | U.S. Representative from Indiana |
| John Hardy | Scotland | Unknown | Democratic | U.S. Representative from New York |
| Alexander Harper | Ireland | Naturalization | Whig | U.S. Representative from Ohio |
| Richard A. Harrison | England | Derivation | Unionist | U.S. Representative from Ohio |
| Nils P. Haugen | Norway | Unknown | Republican | U.S. Representative from Wisconsin |
| William Heilman | Hesse | Unknown | Republican | U.S. Representative from Indiana |
| Samuel Henderson | England | Naturalization | Federalist | U.S. Representative from Pennsylvania |
| Pete Hoekstra |  Netherlands | Derivation | Republican | U.S. Representative from Michigan |
| William Hogan | England | Derivation | Jacksonian | U.S. Representative from New York |
| Einar Hoidale | Norway | Naturalization | Democratic | U.S. Representative from Minnesota |
| Pehr G. Holmes |  Sweden | Unknown | Republican | U.S. Representative from Massachusetts |
| Denis M. Hurley | Ireland | Derivation | Republican | U.S. Representative from New York |
| Jacob Johnson | Denmark | Unknown | Republican | U.S. Representative from Utah |
| John Johnson | Ireland | Derivation | Independent Democratic | U.S. Representative from Ohio |
| Niels Juul | Denmark | Derivation | Republican | U.S. Representative from Illinois |
| John Lauderdale Kennedy | Scotland | Naturalization | Republican | U.S. Representative from Nebraska |
| Ruben Kihuen | Mexico | Naturalization | Democratic | U.S. Representative from Nevada |
| Jay Kim |  Japanese Korea | Naturalization | Republican | U.S. Representative from California |
| Harold Knutson | Norway | Naturalization | Republican | U.S. Representative from Minnesota (House Majority Whip) |
| Ernie Konnyu |  Hungary | Derivation | Republican | U.S. Representative from California |
| John Hans Krebs |  Germany | Derivation | Democratic | U.S. Representative from California |
| Otto Krueger |  Russia | Unknown | Republican | U.S. Representative from North Dakota |
| Tom Lantos | Hungary | Birth | Democratic | U.S. Representative from California |
| Herman Lehlbach | Baden | Unknown | Republican | U.S. Representative from New Jersey |
| Charles Lieb | Württemberg | Unknown | Democratic | U.S. Representative from Indiana |
| John Lind | Sweden | Unknown | Democratic | U.S. Representative from Minnesota |
| Charles August Lindbergh | Sweden | Naturalization | Republican | U.S. Representative from Minnesota |
| Meyer London | Poland | Naturalization | Socialist | U.S. Representative from New York |
| Robert Lowry | Ireland | Unknown | Democratic | U.S. Representative from Indiana |
| John Baptiste Charles Lucas |  France | Naturalization | Democratic-Republican | U.S. Representative from Pennsylvania |
| Thaddeus M. Machrowicz |  Prussia | Unknown | Democratic | U.S. Representative from Michigan |
| John C. Mackie | Canada | Unknown | Democratic | U.S. Representative from Michigan |
| Tom Malinowski | Poland | Unknown | Democratic | U.S. Representative from New Jersey |
| Sean Patrick Maloney | Canada | Birth | Democratic | U.S. Representative from New York |
| Noah M. Mason |  Wales | Unknown | Republican | U.S. Representative from Illinois |
| William McAdoo | Ireland | Unknown | Democrat | U.S. Representative from New Jersey |
| Archibald McBryde | Scotland | Unknown | Federalist | U.S. Representative from North Carolina |
| Blair McClenachan | Ireland | Derivation | Democratic-Republican | U.S. Representative from Pennsylvania |
| William McCreery | Ireland | Naturalization | Democratic-Republican | U.S. Representative from Maryland |
| Donald McEachin |  West Germany | Unknown | Democratic | U.S. Representative from Virginia |
| Lawrence E. McGann | Ireland | Unknown | Democratic | U.S. Representative from Illinois |
| John J. McGrath | Ireland | Naturalization | Democratic | U.S. Representative from California |
| James McLachlan | Scotland | Unknown | Republican | U.S. Representative from California |
| Joseph McLaughlin | Ireland | Derivation | Republican | U.S. Representative from Pennsylvania |
| Frank Joseph McNulty | Ireland | Unknown | Democratic | U.S. Representative from New Jersey |
| M. Alfred Michaelson | Norway | Unknown | Republican | U.S. Representative from Illinois |
| Alfred Milnes | England | Unknown | Republican | U.S. Representative from Michigan |
| William Milnes Jr. | England | Derivation | Conservative | U.S. Representative from Virginia |
| Leopold Morse | Bavaria | Unknown | Democratic | U.S. Representative from Massachusetts |
| William Moxley | Ireland | Unknown | Republican | U.S. Representative from Illinois |
| Debbie Mucarsel-Powell |  Ecuador | Naturalization | Democratic | U.S. Representative from Florida |
| Stephanie Murphy |  Vietnam | Naturalization | Democratic | U.S. Representative from Florida |
| Michael N. Nolan | Ireland | Naturalization | Democratic | U.S. Representative from New York |
| James O'Brien | Ireland | Unknown | Independent Democratic | U.S. Representative from New York |
| Daniel O'Reilly | Ireland | Naturalization | Independent Democratic | U.S. Representative from New York |
| George F. O'Shaunessy | Ireland | Unknown | Democratic | U.S. Representative from Rhode Island |
| Robert Dale Owen | Scotland | Unknown | Democratic | U.S. Representative from Indiana |
| Romualdo Pacheco | Mexico | Unknown | Republican | U.S. Representative from California |
| William Prince | Ireland | Unknown | Democratic-Republican | U.S. Representative from Indiana |
| Joseph Pulitzer | Hungary | Unknown | Democratic | U.S. Representative from New York |
| John Quinn | Ireland | Naturalization | Democratic | U.S. Representative from New York |
| Robert L. Ramsay | England | Unknown | Democratic | U.S. Representative from West Virginia |
| James B. Reynolds | Ireland | Unknown | Democratic-Republican | U.S. Representative from Tennessee |
| John Richards | Wales | Naturalization | Democratic-Republican | U.S. Representative from New York |
| Ciro Rodriguez |  Mexico | Unknown | Democratic | U.S. Representative from Texas |
| Ileana Ros-Lehtinen | Cuba | Derivation | Republican | U.S. Representative from Florida |
| Alphonse Roy | Canada | Naturalization | Democratic | U.S. Representative from New Hampshire |
| William Russell | Ireland | Naturalization | Multiple | U.S. Representative from Ohio |
| Robert Rutherford | Scotland | Derivation | Multiple | U.S. Representative from Virginia |
| Adolph J. Sabath |  Bohemia | Unknown | Democratic | U.S. Representative from Illinois |
| Peter Sailly | France | Naturalization | Democratic-Republican | U.S. Representative from New York |
| Dalip Singh Saund |  British India | Naturalization | Democratic | U.S. Representative from California |
| James Shields | Ireland | Naturalization | Jacksonian | U.S. Representative from Ohio |
| Jerry Simpson |  Prince Edward Island | Derivation | Populist | U.S. Representative from Kansas |
| Albio Sires | Cuba | Derivation | Democratic | U.S. Representative from New Jersey |
| Charles Slade | England | Derivation | Jacksonian | U.S. Representative from Illinois |
| John Smilie | Ireland | Unknown | Multiple | U.S. Representative from Pennsylvania |
| O'Brien Smith | Ireland | Unknown | Democratic-Republican | U.S. Representative from South Carolina |
| Alexander Smyth | Ireland | Derivation | Democratic-Republican | U.S. Representative from Virginia |
| Michelle Steel |  South Korea | Naturalization | Republican | U.S. Representative from California |
| Karl Stefan |  Austria-Hungary | Derivation | Republican | U.S. Representative from Nebraska |
| Isidor Straus | Bavaria | Unknown | Democratic | U.S. Representative from New York |
| Arthur H. Taylor | Canada | Unknown | Democratic | U.S. Representative from Indiana |
| John K. Tener | Ireland | Unknown | Republican | U.S. Representative from Pennsylvania |
| John Thomson | Ireland | Derivation | Jacksonian | U.S. Representative from Ohio |
| Jacob Thorkelson | Norway | Naturalization | Republican | U.S. Representative from Montana |
| Herman Toll | Russian Empire | Unknown | Democratic | U.S. Representative from Pennsylvania |
| Thomas H. Tongue | England | Naturalization | Republican | U.S. Representative from Oregon |
| Charles W. Upham | Canada | Unknown | Whig | U.S. Representative from Massachusetts |
| Weston E. Vivian | Canada | Unknown | Democratic | U.S. Representative from Michigan |
| Benjamin Walker | England | N/A | Federalist | U.S. Representative from New York |
| Michael Walsh | Ireland | Derivation | Democratic | U.S. Representative from New York |
| Knud Wefald | Norway | Naturalization | Farmer-Labor | U.S. Representative from Minnesota |
| Theodore S. Weiss | Hungary | Derivation | Democratic | U.S. Representative from New York |
| Campbell P. White | Ireland | Naturalization | Jacksonian | U.S. Representative from New York |
| James Bain White | Scotland | Unknown | Republican | U.S. Representative from Indiana |
| Susan Wild | West Germany | Birth | Democratic | U.S. Representative from Pennsylvania |
| James Wilson | Scotland | Naturalization | Republican | U.S. Representative from Iowa |
| William Bauchop Wilson | Scotland | Naturalization | Democratic | U.S. Representative from Pennsylvania |
| John Travers Wood | England | Unknown | Republican | U.S. Representative from Idaho |
| Chase G. Woodhouse | Canada | Birth | Democratic | U.S. Representative from Connecticut |
| Charles W. Woodman | Denmark | Derivation | Republican | U.S. Representative from Illinois |
| David Wu |  Taiwan | Unknown | Democratic | U.S. Representative from Oregon |
