List of freshman class members of the 109th United States Congress
The 109th United States Congress began on January 4, 2005. There were nine new senators and 40 new representatives at the start of its first session.
New members at the beginning of the 109th Congress
These senators and representatives served at the beginning of the Congress on January 4, 2005.Senate
| State | Image | Senator | Party | Switched party | Prior background | Birth year |
| Colorado | Ken Salazar | Democratic | Yes Open seat; replaced Ben Nighthorse Campbell | Attorney General of Colorado | 1955 | |
| Florida | Mel Martinez | Republican | Yes Open seat; replaced Bob Graham | United States Secretary of Housing and Urban Development | 1946 | |
| Georgia | Johnny Isakson | Republican | Yes Open seat; replaced Zell Miller | Member of the U.S. House of Representatives | 1944 | |
| Illinois | Barack Obama | Democratic | Yes Open seat; replaced Peter Fitzgerald | Member of Illinois Senate | 1961 | |
| Louisiana | David Vitter | Republican | Yes Open seat; replaced John Breaux | Former Member Louisiana House of Representatives, Member U.S. House of Representatives | 1961 | |
| North Carolina | Richard Burr | Republican | Yes Open seat; replaced John Edwards | Member U.S. House of Representatives | 1955 | |
| Oklahoma | Tom Coburn | Republican | No Open seat; replaced Don Nickles | Former Member U.S. House of Representatives | 1948 | |
| South Carolina | Jim DeMint | Republican | Yes Open seat; replaced Ernest Hollings | MemberU.S. House of Representatives | 1951 | |
| South Dakota | John Thune | Republican | Yes Defeated Tom Daschle | Former MemberU.S. House of Representatives | 1961 |
House of Representatives
| District | Representative | Switched party | Prior background | Birth year |
| Daniel Lungren | No | Former Congressman | 1946 | |
| Jim Costa | No | Family farmer | 1952 | |
| John Salazar | Yes | Soldier | 1953 | |
| Connie Mack IV | No | State Representative | 1967 | |
| Debbie Wasserman Schultz | No | State Representative State Senator | 1966 | |
| Cynthia McKinney | No | Former Congresswoman | 1955 | |
| Tom Price | No | State Senator | 1954 | |
| Lynn Westmoreland | No | State Representative | 1950 | |
| John Barrow | Yes | Athens City Council, Athens County Commissioner | 1955 | |
| Dan Lipinski | No | Political assistant, college professor | 1966 | |
| Melissa Bean | Yes | Sales executive | 1962 | |
| Mike Sodrel | Yes | Guardsman, automotive executive | 1945 | |
| Geoff Davis | Yes | Ranger, manufacturing consultant | 1958 | |
| Bobby Jindal | No | Consultant | 1971 | |
| Charlie Melancon | Yes | State Representative, Small business owner | 1947 | |
| Charles Boustany | Yes | Surgeon | 1956 | |
| Joe Schwarz | No | Physician | 1937 | |
| Russ Carnahan | No | State Representative | 1958 | |
| Emanuel Cleaver | No | Mayor of Kansas City, Minister | 1944 | |
| Jeff Fortenberry | No | Publishing executive, economist | 1960 | |
| Brian Higgins | Yes | Buffalo Common Councilman, State Representative, Political assistant | 1959 | |
| Randy Kuhl | No | State Representative, State Senator, attorney | 1943 | |
| Virginia Foxx | No | State Senator, college professor/administrator | 1943 | |
| Patrick McHenry | No | State Representative, realtor | 1975 | |
| Dan Boren | No | State Representative | 1973 | |
| Mike Fitzpatrick | No | Member of the Bucks County Board of Commissioners, Attorney | 1963 | |
| Allyson Schwartz | No | State Senator | 1948 | |
| Charlie Dent | No | State Representative State Senator | 1960 | |
| Bob Inglis | No | Former Congressman, Attorney | 1959 | |
| Louie Gohmert | Yes | Soldier | 1953 | |
| Ted Poe | Yes | Prosecutor, judge Harris County, Airmen | 1948 | |
| Al Green | No | Justice of the Peace Harris County, attorney | 1947 | |
| Michael McCaul | Yes | Federal prosecutor | 1952 | |
| Mike Conaway | Yes | Soldier | 1948 | |
| Kenny Marchant | Yes | State Representative | 1951 | |
| Henry Cuellar | No | State Representative, Secretary of State Texas, | 1955 | |
| Thelma Drake | No | State Representative, realtor | 1949 | |
| Cathy McMorris | No | State Representative, orchardist | 1969 | |
| Dave Reichert | No | Sheriff King County, Airmen | 1950 | |
| Gwen Moore | No | State Representative, State Senate, civic affairs specialist | 1951 |