|Incumbent||Party||Office||Reason for not seeking re-election|
|Senator Jon L. Kyl||Republican||Senate Class 1||Open Seat. 10 February 2011: Announced retirement|
|Governor Janice K. "Jan" Brewer||Republican||Governor||Open Chair. Term Limit. At term limit|
|Congressman Jeff Flake||Republican||House CD 6||Open Seat. 14 February 2011: Announced that he will run for the U.S. Class 1 Senate Seat in 2012.|
|Governor Mike Beebe||Democratic||Governor||Open Chair. Term Limit. At term limit|
|Congressman Michael Avery "Mike" Ross||Democratic||House CD 4||Open Seat. 25 July 2011: "...I have decided not to seek a seventh term to the United States House..."|
|Congressman Lynn C. Woolsey||Democratic||House CD 6||Open Seat. 27 June 2011: Congressman Woolsey announced her retirement.|
|Congressman Dennis A. Cardoza||Democratic||House CD 18||Open Seat. 20 October 2011: Announced he will not seek re-election.|
|Congressman Bob Filner||Democratic||House CD 51||Open Seat. 9 June 2011: Candidate for Mayor of San Diego in 2012.|
|Senator Joseph I. "Joe" Lieberman||Independent Democrat||Senate Class 1||Open Seat. 19 January 2011: Announced that he will not seek re-election.|
|Congressman Christopher Scott "Chris" Murphy||Democratic||House CD 5||Open Seat. 20 January 2011: Announced he is running for the U.S. Senate Class 1 seat in 2012.|
|Congressman Connie Mack, IV||Republican||House CD 14||Open Seat. 25 March 2011: Congressman Mack WILL NOT be a candidate for the Senate in 2011.|
26 October 2011: Update- Media reports state Congressman Mack WILL be a candidate for the Senate in 2011.
28 November 2011: Announced his candidacy for the Florida Class 1 Senate seat in 2012.
|Senator Daniel Kahikina Akaka||Democratic||Senate Class 1||Open Seat. 2 March 2011: Announced retirement.|
|Congressman Mazie K. Hirono||Democratic||House CD 2||Open Seat. 19 May 2011: Announced her candidacy for the U.S. Senate Class 1 Seat in 2012.|
|Congressman Jerry F. Costello||Democratic||House CD 12||Open Seat. 4 October 2011: Announced retirement.|
|Congressman Joseph Simon "Joe" Donnelly||Democratic||House CD 2||Open Seat. 7 May 2011: Candidate for the Class 1 Senate Seat in 2012|
|Congressman Mike Pence||Republican||House CD 6||Open Seat. 5 May 2011: Candidate for Governor in 2012|
|Governor Martin O'Malley||Democratic||Governor||Open Chair. Term Limit. at term limit|
|Congressman John Walter Olver||Democratic||House CD 1||Open Seat. 26 October 2011: "Therefore, I will retire from the House of Representatives at the conclusion of the current [112th] Congress."|
|Congressman Barney Frank||Democratic||House CD 4||Open Seat. 28 November 2011: Congressman Frank announced that he will not run for re-election.|
|Congressman Dale E. Kildee||Democratic||House CD 5||Open Seat. 15 July 2011: "After careful consideration, I have decided to retire at the end of this term to enjoy more time with my wife, three children and ten grandchildren..."|
|Congressman Michele M. Bachmann||Republican||House CD 6||Open Seat. 13 June 2011: Announced she is a candidate for President in 2012.|
|Governor Haley Reeves Barbour||Republican||Governor||Open Chair. Term Limit|
|Congressman William Todd "Todd" Akin||Republican||House CD 2||Open Seat. 17 May 2011: Candidate for the Senate Class 1 seat in 2012.|
|Congressman Dennis Ray "Denny" Rehberg||Republican||House At-Large||Open Seat. 1 February 2011: Media reports Congressman Rehberg is running for the Class 1 Senate Seat in 2012.|
|Governor Dave Heineman||Republican||Governor||Open Chair. Term Limit. At term limit|
|Congressman Shelley Berkley||Democratic||House CD 1||Open Seat. 14 April 2011: Announced she is running for the Senate Class 1 seat in 2012.|
|Governor John H. Lynch||Democratic||Governor||Open Chair. 15 September 2011: Announced he will not run for re-election.|
|Senator Jesse F. "Jeff" Bingaman, Jr.||Democratic||Senate Class 1||Open Seat. 18 February 2011: Announced retirement.|
|Congressman Martin Trevor Heinrich||Democratic||House CD 1||Open Seat. 2 April 2011: Announced he is running for the Class 1 Senate Seat in 2012.|
|Senator Gaylord Kent "Kent" Conrad||Democratic||Senate Class 1||Open Seat. 18 January 2011: Announced retirement.|
|Congressman Richard A. "Rick" Berg||Republican||House At-Large||Open Seat. 16 May 2011: Congressman Berg announced that he will run for the Senate Class 1 Seat in 2012.|
|Senator Tom Coburn||Republican||Senate Class 3||Open Seat. 16 August 2011: Announced he would not run for re-election in 2016: ".. I'm not running again..."|
|Congressman David Daniel "Dan" Boren||Democratic||House CD 2||Open Seat. 7 June 2011: Media reports state Congressman Boren plans to retire.|
|Congressman David Wu||Democratic||House CD 1||Vacant Office. 25 July 2011: Amid scandal, announced he will not run for re-election.|
26 July 2011: "...I therefore intend to resign effective upon the resolution of the debt-ceiling crisis."
3 August 2011: "... I hereby resign ... effective immediately."
|Senator James W. "Jim" DeMint||Republican||Senate Class 3||Open Seat. 30 August 2011: Announced he will not run for re-election in 2016.|
|Senator Kay Bailey Hutchison||Republican||Senate Class 1||Open Seat. 13 January 2011: "I am announcing today that I will not be a candidate for re-election in 2012...".|
|Congressman Ronald E. "Ron" Paul||Republican||House CD 14||Open Seat. 26 April 2011: Announced he was forming a presidential exploratory committee for 2012.|
13 May 2011: Announced he is a candidate for President in 2012.
12 July 2011: Announced he will not run for re-election.
|Congressman Charles A. Gonzalez||Democratic||House CD 20||Open Seat. 25 November 2011: Announced retirement.|
|Senator James H. "Jim" Webb, Jr.||Democratic||Senate Class 1||Open Seat. 9 February 2011: "...after much thought and consideration I have decided to return to the private sector ... and will not seek re-election in 2012."|
|Governor Robert F. "Bob" McDonnell||Republican||Governor||Open Chair. Term Limit|
|Governor Christine "Chris" Gregoire||Democratic||Governor||Open Chair. 13 June 2011: "Today, I say I will not run for a third term as governor ...."|
|Congressman Jay R. Inslee||Democratic||House CD 1||Open Seat. 24 June 2011: Candidate for Governor in 2012.|
|Senator Herbert H. "Herb" Kohl||Democratic||Senate Class 1||Open Seat. 13 May 2011: Media reports say Senator Kohl will not seek re-election in 2012.|
|Congressman Tammy Baldwin||Democratic||House CD 2||Open Seat. 5 September 2011: Candidate for the U.S. Senate Class 1 Seat in 2012.|
|Office||Reason for Open Chair or Seat|
Parties appear in parenthesis and italics when a candidate receives the endorsement of a given Party and/or official sources indicate a candidate's association with a particular Party but only where the Party in question does not appear on the actual ballot as such.
2011 Off-Year Election Home