The 110th United States Congress began on January 3, 2007. There were 10 new senators (eight Democrats, one Republican, one independent) and 54 new representatives (41 Democrats, 13 Republicans) at the start of its first session. Additionally, two senators (both Republicans) and 13 representatives (nine Democrats, four Republicans) took office on various dates in order to fill vacancies during the 110th Congress before it ended on January 3, 2009.

The representatives comprise a diverse group reflecting the multiculturalism of the United States. One representative graduated with a high school class of 25; another is said to have a net worth of $50 million. Backgrounds include teachers, musicians, authors, engineers, a vice admiral, and a professional football player. Religions include Christianity, Buddhism, Judaism, and Islam (none claims to be atheist or agnostic). When taking office, ages ranged from 33 to 66, placing the class mostly in the baby boomer and generation X categories. Of this group 12 are female.

Senate Took office January 3, 2007 State Image Senator Seniority Party change Prior background Birth yearMaryland (D)(91st overall)No Open seat; replaced Paul Sarbanes (D)U.S. House of RepresentativesMaryland House of Delegates1943Minnesota (DFL)(98th overall)No Open seat; replaced Mark Dayton (DFL)Hennepin County Prosecuting Attorney1960Missouri (D)(97th overall)Yes Defeated Jim Talent (R)State Auditor of MissouriJackson County ProsecutorMissouri House of Representatives1953Montana (D)(100th overall)Yes Defeated Conrad Burns (R)Montana Senate1956Ohio (D)(93rd overall)Yes Defeated Mike DeWine (R)U.S. House of RepresentativesSecretary of State of OhioOhio House of Representatives1952Pennsylvania (D)(94th overall)Yes Defeated Rick Santorum (R)Pennsylvania TreasurerPennsylvania Auditor General1960Rhode Island (D)(99th overall)Yes Defeated Lincoln Chafee (R)Attorney General of Rhode IslandU.S. Attorney for Rhode Island1955Tennessee (R)(96th overall)No Open Seat; Replaced Bill Frist (R)Mayor of Chattanooga1952Vermont (I)(92nd overall)No Open seat; replaced Jim Jeffords (I)U.S. House of RepresentativesMayor of Burlington1941Virginia (D)(95th overall)Yes Defeated George Allen (R)U.S. Secretary of the NavyAssistant Secretary of Defense1946

Took office during the 110th Congress State Image Senator Took office Party change Prior background Birth year Wyoming (R) No Wyoming Senate 1952 Mississippi (R) No U.S. House of RepresentativesMississippi Senate 1951

House of Representatives Took office January 3, 2007 DistrictImage Representative Party change Prior background Birth year Harry Mitchell (D)YesMayor of Tempe1940 Gabby Giffords (D)YesState Senator1970 Jerry McNerney (D)YesEngineer1951 Kevin McCarthy (R)NoState Assemblyman1965 Doug Lamborn (R)NoState Senator1954 Ed Perlmutter (D)YesState Senator1953 Joe Courtney (D)YesState Representative1953 Chris Murphy (D)YesState Senator1973 Gus Bilirakis (R)NoState Representative1963 Kathy Castor (D)NoHillsborough County Commissioner1966 Vern Buchanan (R)NoBusiness owner1951 Tim Mahoney (D)YesCOO of vFinance1956 Ron Klein (D)YesState Senator1957 Hank Johnson (D)NoCounty Commissioner1954 Mazie Hirono (D)NoLieutenant Governor1947 Bill Sali (R)NoState Representative1954 Peter Roskam (R)NoState Senator1961 Phil Hare (D)NoUnion President1949 Joe Donnelly (D)YesLawyer1955 Brad Ellsworth (D)Yes Vanderburgh County Sheriff1958 Baron Hill (D)Yesformer U.S. Representative1953 Bruce Braley (D)YesLawyer1957 Dave Loebsack (D)YesPolitical Science Professor1952 Nancy Boyda (D)YesChemist1955 John Yarmuth (D)YesPublisher1947 John Sarbanes (D)NoLawyer1962 Tim Walberg (R)NoState Representative1951 Tim Walz (D)YesTeacher1964 Keith Ellison (D)NoState Representative1963 Michele Bachmann (R)NoState Senator1956 Adrian Smith (R)NoState Legislator 1970 Dean Heller (R)NoSecretary of State1960 Carol Shea-Porter (D)YesSocial Worker1954 Paul Hodes (D)YesAssistant State Attorney General1951 Yvette D. Clarke (D)NoNew York City Council member1964 John Hall (D)YesMusician1948 Kirsten Gillibrand (D)YesLawyer1966 Michael Arcuri (D)YesOneida County District Attorney1959 Heath Shuler (D)YesReal estate professionaland former NFL player1971 Jim Jordan (R)NoState Senator1964 Charlie Wilson (D)NoState Senator1943 Betty Sutton (D)NoState Representative1963 Zack Space (D)YesCity Law Director1961 Mary Fallin (R)NoLieutenant Governor1954 Jason Altmire (D)YesHealthcare Executive 1968 Joe Sestak (D)YesNavy vice admiral1951 Patrick Murphy (D)YesProfessor1973 Chris Carney (D)YesAssociate Professor1959 David Davis (R)NoState Representative1959 Steve Cohen (D)NoState Senator1949 Nick Lampson (D)Yesformer U.S. Representative1945 Ciro Rodriguez (D)Yesformer U.S. Representative1946 Peter Welch (D)Yes/NoState Senator1947 Steve Kagen (D)YesMedical Doctor1949

Took office during the 110th Congress District Representative Took office Party change Prior background Birth year (R) No Medical Doctor 1946 (D) No State Assemblywoman 1962 (D) No College dean 1946 (R) No State Representative 1956 (R) No State Delegate 1959 (D) Yes Physicist 1955 (D) No City Councilor 1974 (D) Yes County Clerk 1958 (R) No State Senator 1965 (D) Yes State Representative 1964 (D) No State Senator 1950 (D) No Community activist 1958 (D) No Mayor of Warrensville Heights 1952

See also List of United States representatives in the 110th Congress List of United States senators in the 110th Congress

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