Senate Seniority List – Democrats: 113th Congress
Updated February, 2014
Source: http://www.senate.gov/artandhistory/history/resources/pdf/chronlist.pdf
Senate rank is first determined by the length of consecutive service in the Senate. For senators who entered the Senate on the same day, several tie-breaking procedures determine seniority. In order of precedence, these factors are: previous Senate service, service as the vice president, previous House service; service in the Cabinet, service as a state governor. If a tie still exists, senators are ranked according to the population of their state at the time of swearing in.
Rank Democrats Date Service Began 1. Patrick J. Leahy, Vt. Jan. 3, 1975 2. Carl Levin, Mich. Jan. 3, 1979
3. Tom Harkin, Iowa Jan. 3, 1985 4. John D. Rockefeller IV, W.Va. Jan. 15, 1985 5. Barbara A. Mikulski, Md. Jan. 3, 1987 6. Harry Reid, Nev. Jan. 3, 1987 7. Dianne Feinstein, Calif. Nov. 4, 1992 8. Barbara Boxer, Calif. Jan. 3, 1993 9. Patty Murray, Wash. Jan. 3, 1993 10. Ron Wyden, Ore. Feb. 6, 1996 11. Richard J. Durbin, Ill. Jan. 3, 1997 12. Tim Johnson, S.D. Jan. 3, 1997 13. Jack Reed, R.I. Jan. 3, 1997 14. Mary L. Landrieu, La. Jan. 3, 1997 15. Charles E. Schumer, N.Y. Jan. 3, 1999 16. Bill Nelson, Fla. Jan. 3, 2001 17. Thomas R. Carper, Del. Jan. 3, 2001 18. Debbie Stabenow, Mich. Jan. 3, 2001 19. Maria Cantwell, Wash. Jan. 3, 2001 20. Mark Pryor, Ark. Jan. 3, 2003 21. Robert Menendez, N.J. Jan. 18, 2006 22. Benjamin L. Cardin, Md. Jan. 3, 2007 23. Bernie Sanders, I-Vt. Jan. 3, 2007 24. Sherrod Brown, Ohio Jan. 3, 2007 25. Bob Casey, Pa. Jan. 3, 2007 26. Claire McCaskill, Mo. Jan. 3, 2007 27. Amy Klobuchar, Minn. Jan. 3, 2007 28. Sheldon Whitehouse, R.I. Jan. 3, 2007 29. Jon Tester, Mont. Jan. 3, 2007 30. Mark Udall, Colo. Jan. 3, 2009 31. Tom Udall, N.M. Jan. 3, 2009 32. Jeanne Shaheen, N.H. Jan. 3, 2009 33. Mark Warner, Va. Jan. 3, 2009 34. Kay Hagan, N.C. Jan. 3, 2009 35. Jeff Merkley, Ore. Jan. 3, 2009 36. Mark Begich, Alaska Jan. 3, 2009 37. Michael Bennet, Colo. Jan. 22, 2009 38. Kirsten Gillibrand, N.Y. Jan. 27, 2009 39. Al Franken, Minn. Jul. 7, 2009 40. Joe Manchin, W. Va. Nov. 15, 2010 41. Chris Coons, Del. Nov. 15, 2010 42. Richard Blumenthal, Conn. Jan. 3, 2011 43. Brian Schatz, Hawaii. Dec. 27, 2012 44. Tammy Baldwin, Wis. Jan. 3, 2013 45. Joe Donnelly, Ind. Jan. 3, 2013 46. Chris Murphy, Conn. Jan. 3, 2013 47. Mazie Hirono, Hawaii. Jan. 3, 2013 48. Martin Heinrich, N.M. Jan. 3, 2013 49. Angus King (I-ME) Jan. 3, 2013 50. Tim Kaine, Va. Jan. 3, 2013 51. Elizabeth Warren, MA Jan. 3, 2013 52. Heidi Heitkamp, N.D. Jan. 3, 2013 53. Edward Markey, MA Jul. 16, 2013 54. Cory Booker, N.J. Oct. 31, 2013 55. John Walsh, MT Feb. 11, 2014