| Maria Cabildo | U.S. House | CA | Democratic | 1 |
| Justin Cabral | U.S. House | KS | Republican | 1 |
| Ed Cabrera | U.S. House | TX | Republican | 1 |
| Fernando Cabrera | U.S. House | NY | Democratic | 1 |
| Ming A. Cabrera | U.S. House | MT | Democratic | 1 |
| Devon Cade | U.S. Senate | WY | Republican | 1 |
| Angel Luis Cadena Jr | U.S. House | CT | Republican | 1 |
| Robert M. Cadena | U.S. House | TX | Republican | 1 |
| Tawana W. Cadien | U.S. House | TX | Democratic | 1 |
| Jeffery Cady | U.S. House | TX | Independent | 1 |
| Matthew Dale Cady | U.S. House | PA | Democratic | 2 |
| Andy Caffrey | U.S. House | CA | Democratic | 1 |
| Bryan Caforio | U.S. House | CA | Democratic | 1 |
| Dennis (Nate) Nathan Cain | U.S. House | WV | Republican | 1 |
| Emily Cain | U.S. House | ME | Democratic | 1 |
| Scott Caine | U.S. House | FL | Republican | 1 |
| Herman Cain | President | US | Republican | 2 |
| Ian Cain | U.S. Senate | MA | Republican | 1 |
| John Cain | U.S. House | MA | Republican | 1 |
| Salvatore Caiozzo | U.S. House | RI | Republican | 1 |
| Celeste Cairns | U.S. House | NC | Republican | 1 |
| Curtis Calabrese | U.S. House | FL | Democratic | 1 |
| Michael Calabrese | President | US | Democratic | 1 |
| Joseph Matthew Caldarera | U.S. House | NY | Republican | 1 |
| Marisa Calderon | U.S. House | CA | Democratic | 1 |
| Roza I. Calderon | U.S. House | CA | Democratic | 1 |
| James Andrew Caldwell | U.S. House | CA | Republican | 1 |
| Kevin Terome Caldwell | U.S. House | MD | Republican | 2 |
| Randy Caldwell | U.S. House | AR | Republican | 1 |
| Aaron (A.J.) Calkins | U.S. House | IN | Democratic | 1 |
| Mark Allen Callahan | U.S. House | OR | Republican | 1 |
| Chuck Callesto | U.S. House | FL | Republican | 1 |
| Jason Call | U.S. House | WA | Democratic | 3 |
| David L. Calone | U.S. House | NY | OTH | 2 |
| Trisha Calvarese | U.S. House | CO | Democratic | 1 |
| Ken Calvert | U.S. House | CA | Republican | 1 |
| Kevin Calvey | U.S. House | OK | Republican | 2 |
| Jonathan Camarillo | U.S. House | TX | Republican | 1 |
| Kress Franklin Cambers | U.S. House | MO | Republican | 1 |
| Roberto Felix Cambert | President | US | Republican | 1 |
| Eban Cambridge | President | US | Democratic | 1 |
| Michael Camero | U.S. House | NC | Democratic | 1 |
| Craig Cameron | U.S. House | IL | Republican | 1 |
| Kyle G. Cameron | U.S. House | WY | Democratic | 1 |
| Charles William Camilleri | President | US | Democratic | 1 |
| Kat Cammack | U.S. House | FL | Republican | 1 |
| Mike Cammisa | U.S. House | PA | Republican | 1 |
| Gino Campana | U.S. Senate | CO | Republican | 1 |
| Ammar Campa-Najjar | U.S. House | CA | Democratic | 1 |
| Andrew Jackson Campbell | U.S. House | VA | Democratic | 1 |
| Antono Wade Campbell | U.S. Senate | MD | Republican | 1 |
| Bill Campbell | U.S. House | UT | Democratic | 1 |
| Cameron Campbell | U.S. House | TX | Democratic | 1 |
| Christopher Joesph Campbell | President | US | Democratic | 1 |
| David R. Campbell | U.S. House | OR | Republican | 1 |
| Foster Lonnnie Campbell II | U.S. Senate | LA | Democratic | 1 |
| Heidi Campbell | U.S. House | TN | Democratic | 1 |
| Jim Soupy Campbell | U.S. House | MO | Republican | 1 |
| John Bt Campbell III | U.S. House | CA | Republican | 1 |
| Johnnie Campbell | President | US | NNE | 1 |
| Johnnie C. Campbell | President | US | Democratic | 4 |
| Joshua Campbell | U.S. House | WA | Republican | 1 |
| Landon Neil Campbell | U.S. House | FL | Republican | 1 |
| Luther Campbell | U.S. House | FL | Democratic | 1 |
| Matthew Campbell | U.S. House | IA | Democratic | 1 |
| Rayla Campbell | U.S. House | MA | Republican | 1 |
| Samantha Campbell | U.S. House | CA | Democratic | 1 |
| Stanley Campbell | U.S. Senate | FL | Democratic | 2 |
| Thomas Scott Campbell | U.S. House | ND | Republican | 1 |
| Tom Campbell | U.S. House | ND | Republican | 1 |
| William Campbell | U.S. House | UT | Republican | 2 |
| David Lee Camp | U.S. House | MI | Republican | 1 |
| Joey Anthony Camp | President | US | Independent | 2 |
| Jojo Camp | President | US | Independent | 1 |
| Joseph A. Camp | U.S. House | CO | Independent | 1 |
| Joseph Anthony Camp | U.S. Senate | CO | Independent | 1 |
| Lori Ann Camp | U.S. House | IN | Democratic | 1 |
| Louie J. Campos | U.S. House | CA | Democratic | 1 |
| Patricia Campos-Medina | U.S. Senate | NJ | Democratic | 1 |
| Quinci Canada | President | US | Republican | 1 |
| Sara Larue Newnam Canady | U.S. House | TX | Republican | 1 |
| Judith Ann Canales | U.S. House | TX | Democratic | 1 |
| David Canepa | U.S. House | CA | Democratic | 1 |
| David B. Cannata | U.S. House | MA | W | 1 |
| Thomas Cannavo | U.S. House | NJ | Green | 1 |
| Doyle Canning | U.S. House | OR | Democratic | 1 |
| Doyle Canning | U.S. House | OR | Democratic | 1 |
| Beau Alexander Ryan Cannon | U.S. House | GA | Democratic | 1 |
| Tina Cannon | U.S. House | UT | Republican | 2 |
| Fernando Christian Cano Jr. | U.S. House | NC | Democratic | 1 |
| Daniel J. Canon | U.S. House | IN | Democratic | 1 |
| Sandra C. Cano | U.S. House | RI | Democratic | 1 |
| Timothy A. Canova | U.S. House | FL | Independent | 1 |
| Francisco 'Quico' Canseco | U.S. House | TX | Republican | 2 |
| Stephen G. Canton | U.S. House | FL | Independent | 1 |
| Stephen Gregory Canton | U.S. House | FL | Independent | 1 |
| George Allen Cantrell | U.S. House | GA | Independent | 1 |
| Juana Cantu Cabrera | U.S. House | TX | Republican | 1 |
| Maria Cantwell | U.S. Senate | WA | Democratic | 4 |
| Hung Cao | U.S. Senate | VA | Republican | 1 |
| Hung Cao | U.S. House | VA | Republican | 1 |
| Shelley Moore Capito | U.S. Senate | WV | Republican | 4 |
| Stan Caplan | U.S. House | CA | Republican | 2 |
| Amanda Capobianco | U.S. House | CO | Republican | 1 |
| Amanda Capobianco | U.S. House | CO | Republican | 1 |
| Amanda Capobianco | U.S. House | CO | Republican | 1 |
| Christopher Paul Capparell | U.S. House | GA | Democratic | 1 |
| David J. Cappiello | U.S. House | CT | Republican | 1 |
| Michael T. Sgt Captain | President | US | N/A | 1 |
| Michael E. Capuano | U.S. House | MA | Democratic | 1 |
| Rafael Caracamo | U.S. House | CA | Republican | 1 |
| Yadira Caraveo | U.S. House | CO | Democratic | 1 |
| Barbara Len Mallory Caraway | U.S. House | TX | Democratic | 1 |
| Salud O. Carbajal | U.S. House | CA | Democratic | 1 |
| Anthony M. Carbonaro | U.S. House | MI | Democratic | 1 |
| Anthony Michael Carbonaro | U.S. House | MI | W | 1 |
| Marcelo Gabriel Cardarelli | U.S. House | MD | Republican | 1 |
| Simon Wb Cardell | U.S. House | TX | Democratic | 1 |
| Beatrice for Cardenas | U.S. House | CA | Republican | 1 |
| Tony Cardenas | U.S. House | CA | Democratic | 1 |
| Robin Carder | U.S. House | OK | Republican | 1 |
| Paul Cardinal | U.S. House | NH | Democratic | 1 |
| Benjamin L. Cardin | U.S. Senate | MD | Democratic | 1 |
| Elisa Cardnell | U.S. House | TX | Democratic | 1 |
| Nicholas Matthew Carducci | U.S. Senate | NJ | Independent | 1 |
| Charles Patteson Cardwell IV | U.S. House | VA | Republican | 1 |
| Glenn Carey | U.S. House | OR | Republican | 1 |
| Jan Carey | U.S. House | NC | Democratic | 1 |
| Mike Carey | U.S. House | OH | Republican | 1 |
| Peter Anthony Carey | U.S. House | VA | OTH | 1 |
| Mike Cargile | U.S. House | CA | Republican | 1 |
| Arrechea Carl | President | US | NNE | 1 |
| Boyanton Carl | U.S. House | MS | Republican | 2 |
| Thomas A. Carle | U.S. House | NY | Democratic | 1 |
| Deedee Carleton | U.S. Senate | WI | Republican | 1 |
| James M. Carlin | U.S. Senate | IA | Republican | 1 |
| Jerry Lee, Carl Jr. | U.S. House | AL | Republican | 1 |
| Don Carlson | U.S. House | RI | Democratic | 1 |
| Eric Joseph Carlson | U.S. House | IL | Republican | 1 |
| Kristen Carlson | U.S. House | FL | Democratic | 1 |
| Robert Lee Carlson | U.S. House | NJ | Democratic | 1 |
| Steve Carlson | U.S. Senate | MN | Democratic | 1 |
| David Carlucci | U.S. House | NY | Democratic | 1 |
| Goers Carmen | U.S. House | WA | Republican | 1 |
| Adam J. Carmichael | U.S. House | CA | Democratic | 1 |
| Robert Marc Carmichael | U.S. Senate | IN | Democratic | 1 |
| Arturo Carmona | U.S. House | CA | Democratic | 1 |
| Jennifer Carnahan | U.S. House | MN | Republican | 1 |
| Michael Carnevale | U.S. House | FL | Republican | 1 |
| John Carney | U.S. House | DE | Democratic | 1 |
| Kevin John Carney | President | US | Democratic | 1 |
| Kevin John Carney | President | US | Democratic | 1 |
| Ailina Carona | U.S. House | TN | Democratic | 1 |
| Craya Conradina Caron | U.S. House | CA | Republican | 1 |
| Douglas M. Carpenter | U.S. House | IN | Democratic | 1 |
| Thomas R. Carper | U.S. Senate | DE | Democratic | 1 |
| Evan Carp | U.S. House | OH | Republican | 1 |
| Monica Carpio | U.S. House | VA | Republican | 1 |
| Margarita Maria Mmc Mmc Carranza | U.S. House | CA | Republican | 1 |
| Stephen Carra | U.S. House | MI | Republican | 1 |
| Bob Carr | U.S. Senate | MI | Republican | 1 |
| Elan S. Carr | U.S. House | CA | Republican | 1 |
| Jamison Carrier | U.S. House | IN | Republican | 1 |
| Michael Xavier Carrigan | U.S. House | OH | Democratic | 1 |
| Sean J. Carrigan | U.S. House | SC | Democratic | 1 |
| John Rene Carrillo | U.S. House | TX | Democratic | 1 |
| Francisco Carrillo Jr | U.S. House | CA | Democratic | 1 |
| Jim Carris | U.S. House | IL | Republican | 1 |
| Joshua Daniel Carrizales | U.S. House | TX | Republican | 1 |
| James Lester Carr Jr. | U.S. Senate | NC | Democratic | 1 |
| Joe Carr | U.S. House | TN | Republican | 1 |
| Maryann Carr | U.S. House | NY | Democratic | 1 |
| Brian Carroll | U.S. House | CA | Democratic | 1 |
| Brian T. Carroll | President | US | NPA | 1 |
| Jerry Leon Carroll | U.S. Senate | CA | OTH | 1 |
| Jerry Leon Carroll | President | US | NNE | 1 |
| Mark Joseph Carroll | U.S. House | IL | Republican | 1 |
| Joseph Allen Carron | President | US | NNE | 1 |
| Andre Carson | U.S. House | IN | Democratic | 1 |
| Benjamin S. MD Carson Sr. | President | US | Republican | 1 |
| Brad R. Carson | U.S. Senate | OK | Democratic | 1 |
| Paulette Carson | U.S. House | TX | Republican | 1 |
| Samuel Alexander Carswell | President | US | AKI | 1 |
| Deandre Antwan Carter | U.S. House | NC | Democratic | 1 |
| Earl Leroy Carter | U.S. House | GA | Republican | 1 |
| Gregory Marcus Carter | President | US | Independent | 1 |
| Gregory Marcus Carter | U.S. House | FL | NON | 1 |
| Jill P. Carter | U.S. House | MD | Democratic | 1 |
| John R. Carter | U.S. House | TX | Republican | 1 |
| Thomas Joseph Carter | U.S. House | VA | Republican | 1 |
| Troy A. Carter Sr. | U.S. House | LA | Democratic | 1 |
| Willie Felix Carter | President | US | Democratic | 1 |
| Matthew A. Cartwright | U.S. House | PA | Democratic | 1 |
| Nicholas Cartwright | U.S. House | AR | Democratic | 1 |
| Jill Ann Carty | President | US | IDP | 1 |
| Michelle Caruso-Cabrera | U.S. House | NY | Democratic | 1 |
| Elizabeth Caruso | U.S. House | ME | Republican | 1 |
| Cj L. Cary | President | US | Republican | 1 |
| Stanley "Stan" Casacio | U.S. House | PA | Republican | 1 |
| Nancy Lee Casady | U.S. House | CA | Democratic | 1 |