| Senator's Name (Party-State) | State | Party | Class |
|---|---|---|---|
| Alexander, Lamar (R-TN) | Tennessee | Republican | Class II |
| Baldwin, Tammy (D-WI) | Wisconsin | Democrat | Class I |
| Barrasso, John (R-WY) | Wyoming | Republican | Class I |
| Bennet, Michael F. (D-CO) | Colorado | Democrat | Class III |
| Blumenthal, Richard (D-CT) | Connecticut | Democrat | Class III |
| Blunt, Roy (R-MO) | Missouri | Republican | Class III |
| Booker, Cory A. (D-NJ) | New Jersey | Democrat | Class II |
| Boozman, John (R-AR) | Arkansas | Republican | Class III |
| Brown, Sherrod (D-OH) | Ohio | Democrat | Class I |
| Burr, Richard (R-NC) | North Carolina | Republican | Class III |
| Cantwell, Maria (D-WA) | Washington | Democrat | Class I |
| Capito, Shelley Moore (R-WV) | West Virginia | Republican | Class II |
| Cardin, Benjamin L. (D-MD) | Maryland | Democrat | Class I |
| Carper, Thomas R. (D-DE) | Delaware | Democrat | Class I |
| Casey, Robert P., Jr. (D-PA) | Pennsylvania | Democrat | Class I |
| Cassidy, Bill (R-LA) | Louisiana | Republican | Class II |
| Collins, Susan M. (R-ME) | Maine | Republican | Class II |
| Coons, Christopher A. (D-DE) | Delaware | Democrat | Class II |
| Corker, Bob (R-TN) | Tennessee | Republican | Class I |
| Cornyn, John (R-TX) | Texas | Republican | Class II |
| Cortez Masto, Catherine (D-NV) | Nevada | Democrat | Class III |
| Cotton, Tom (R-AR) | Arkansas | Republican | Class II |
| Crapo, Mike (R-ID) | Idaho | Republican | Class III |
| Cruz, Ted (R-TX) | Texas | Republican | Class I |
| Daines, Steve (R-MT) | Montana | Republican | Class II |
| Donnelly, Joe (D-IN) | Indiana | Democrat | Class I |
| Duckworth, Tammy (D-IL) | Illinois | Democrat | Class III |
| Durbin, Richard J. (D-IL) | Illinois | Democrat | Class II |
| Enzi, Michael B. (R-WY) | Wyoming | Republican | Class II |
| Ernst, Joni (R-IA) | Iowa | Republican | Class II |
| Feinstein, Dianne (D-CA) | California | Democrat | Class I |
| Fischer, Deb (R-NE) | Nebraska | Republican | Class I |
| Flake, Jeff (R-AZ) | Arizona | Republican | Class I |
| Gardner, Cory (R-CO) | Colorado | Republican | Class II |
| Gillibrand, Kirsten E. (D-NY) | New York | Democrat | Class I |
| Graham, Lindsey (R-SC) | South Carolina | Republican | Class II |
| Grassley, Chuck (R-IA) | Iowa | Republican | Class III |
| Harris, Kamala D. (D-CA) | California | Democrat | Class III |
| Hassan, Margaret Wood (D-NH) | New Hampshire | Democrat | Class III |
| Hatch, Orrin G. (R-UT) | Utah | Republican | Class I |
| Heinrich, Martin (D-NM) | New Mexico | Democrat | Class I |
| Heitkamp, Heidi (D-ND) | North Dakota | Democrat | Class I |
| Heller, Dean (R-NV) | Nevada | Republican | Class I |
| Hirono, Mazie K. (D-HI) | Hawaii | Democrat | Class I |
| Hoeven, John (R-ND) | North Dakota | Republican | Class III |
| Hyde-Smith, Cindy (R-MS) | Mississippi | Republican | Class II |
| Inhofe, James M. (R-OK) | Oklahoma | Republican | Class II |
| Isakson, Johnny (R-GA) | Georgia | Republican | Class III |
| Johnson, Ron (R-WI) | Wisconsin | Republican | Class III |
| Jones, Doug (D-AL) | Alabama | Democrat | Class II |
| Kaine, Tim (D-VA) | Virginia | Democrat | Class I |
| Kennedy, John (R-LA) | Louisiana | Republican | Class III |
| King, Angus S., Jr. (I-ME) | Maine | Independent | Class I |
| Klobuchar, Amy (D-MN) | Minnesota | Democrat | Class I |
| Lankford, James (R-OK) | Oklahoma | Republican | Class III |
| Leahy, Patrick J. (D-VT) | Vermont | Democrat | Class III |
| Lee, Mike (R-UT) | Utah | Republican | Class III |
| Manchin, Joe, III (D-WV) | West Virginia | Democrat | Class I |
| Markey, Edward J. (D-MA) | Massachusetts | Democrat | Class II |
| McCain, John (R-AZ) | Arizona | Republican | Class III |
| McCaskill, Claire (D-MO) | Missouri | Democrat | Class I |
| McConnell, Mitch (R-KY) | Kentucky | Republican | Class II |
| Menendez, Robert (D-NJ) | New Jersey | Democrat | Class I |
| Merkley, Jeff (D-OR) | Oregon | Democrat | Class II |
| Moran, Jerry (R-KS) | Kansas | Republican | Class III |
| Murkowski, Lisa (R-AK) | Alaska | Republican | Class III |
| Murphy, Christopher (D-CT) | Connecticut | Democrat | Class I |
| Murray, Patty (D-WA) | Washington | Democrat | Class III |
| Nelson, Bill (D-FL) | Florida | Democrat | Class I |
| Paul, Rand (R-KY) | Kentucky | Republican | Class III |
| Perdue, David (R-GA) | Georgia | Republican | Class II |
| Peters, Gary C. (D-MI) | Michigan | Democrat | Class II |
| Portman, Rob (R-OH) | Ohio | Republican | Class III |
| Reed, Jack (D-RI) | Rhode Island | Democrat | Class II |
| Risch, James E. (R-ID) | Idaho | Republican | Class II |
| Roberts, Pat (R-KS) | Kansas | Republican | Class II |
| Rounds, Mike (R-SD) | South Dakota | Republican | Class II |
| Rubio, Marco (R-FL) | Florida | Republican | Class III |
| Sanders, Bernard (I-VT) | Vermont | Independent | Class I |
| Sasse, Ben (R-NE) | Nebraska | Republican | Class II |
| Schatz, Brian (D-HI) | Hawaii | Democrat | Class III |
| Schumer, Charles E. (D-NY) | New York | Democrat | Class III |
| Scott, Tim (R-SC) | South Carolina | Republican | Class III |
| Shaheen, Jeanne (D-NH) | New Hampshire | Democrat | Class II |
| Shelby, Richard C. (R-AL) | Alabama | Republican | Class III |
| Smith, Tina (D-MN) | Minnesota | Democrat | Class II |
| Stabenow, Debbie (D-MI) | Michigan | Democrat | Class I |
| Sullivan, Dan (R-AK) | Alaska | Republican | Class II |
| Tester, Jon (D-MT) | Montana | Democrat | Class I |
| Thune, John (R-SD) | South Dakota | Republican | Class III |
| Tillis, Thom (R-NC) | North Carolina | Republican | Class II |
| Toomey, Patrick J. (R-PA) | Pennsylvania | Republican | Class III |
| Udall, Tom (D-NM) | New Mexico | Democrat | Class II |
| Van Hollen, Chris (D-MD) | Maryland | Democrat | Class III |
| Warner, Mark R. (D-VA) | Virginia | Democrat | Class II |
| Warren, Elizabeth (D-MA) | Massachusetts | Democrat | Class I |
| Whitehouse, Sheldon (D-RI) | Rhode Island | Democrat | Class I |
| Wicker, Roger F. (R-MS) | Mississippi | Republican | Class I |
| Wyden, Ron (D-OR) | Oregon | Democrat | Class III |
| Young, Todd (R-IN) | Indiana | Republican | Class III |
