http://www.senate.gov/pagelayout/reference/two_column_table/Class_III.htm
Class III - Senators Whose Terms of Service Expire in 2011
Senators in Class III were elected to office in the November 2004 general election. Their terms run from the beginning of the 109th Congress on January 3, 2005 to the end of the 111th Congress in January 2011.
Democrats
Bayh, Evan (D-IN)
Boxer, Barbara (D-CA)
Dodd, Christopher J. (D-CT)
Dorgan, Byron L. (D-ND)
Feingold, Russell D. (D-WI)
Inouye, Daniel K. (D-HI)
Leahy, Patrick J. (D-VT)
Lincoln, Blanche L. (D-AR)
Mikulski, Barbara A. (D-MD)
Murray, Patty (D-WA)
Obama, Barack (D-IL)
Reid, Harry (D-NV)
Salazar, Ken (D-CO)
Schumer, Charles E. (D-NY)
Wyden, Ron (D-OR)
Republicans
Bennett, Robert F. (R-UT)
Bond, Christopher S. (R-MO)
Brownback, Sam (R-KS)
Bunning, Jim (R-KY)
Burr, Richard (R-NC)
Coburn, Tom (R-OK)
Crapo, Mike (R-ID)
DeMint, Jim (R-SC)
Grassley, Chuck (R-IA)
Gregg, Judd (R-NH)
Isakson, Johnny (R-GA)
Martinez, Mel (R-FL)
McCain, John (R-AZ)
Murkowski, Lisa (R-AK)
Shelby, Richard C. (R-AL)
Specter, Arlen (R-PA)
Thune, John (R-SD)
Vitter, David (R-LA)
Voinovich, George V. (R-OH)