| 1 | Alexander (R-TN) | Alexander | Lamar | R | TN | 455 Dirksen Senate Office Building Washington DC 20510 | (202) 224-4944 | www.alexander.senate.gov/public/index.cfm?p=Email | http://www.alexander.senate.gov/ | Class II | |
| 2 | Ayotte (R-NH) | Ayotte | Kelly | R | NH | 144 Russell Senate Office Building Washington DC 20510 | (202) 224-3324 | www.ayotte.senate.gov/?p=contact | http://www.ayotte.senate.gov | Class III | |
| 3 | Baldwin (D-WI) | Baldwin | Tammy | D | WI | 717 Hart Washington DC 20510 | (202) 224-5653 | www.baldwin.senate.gov/feedback | http://www.baldwin.senate.gov/ | Class I | |
| 4 | Barrasso (R-WY) | Barrasso | John | R | WY | 307 Dirksen Senate Office Building Washington DC 20510 | (202) 224-6441 | www.barrasso.senate.gov/public/index.cfm/contact-form | http://www.barrasso.senate.gov | Class I | |
| 5 | Bennet (D-CO) | Bennet | Michael F. | D | CO | 261 Russell Senate Office Building Washington DC 20510 | (202) 224-5852 | www.bennet.senate.gov/?p=contact | http://www.bennet.senate.gov | Class III | |
| 6 | Blumenthal (D-CT) | Blumenthal | Richard | D | CT | 706 Hart Senate Office Building Washington DC 20510 | (202) 224-2823 | www.blumenthal.senate.gov/contact/ | http://www.blumenthal.senate.gov | Class III | |
| 7 | Blunt (R-MO) | Blunt | Roy | R | MO | 260 Russell Senate Office Building Washington DC 20510 | (202) 224-5721 | www.blunt.senate.gov/public/index.cfm/contact-roy | http://www.blunt.senate.gov | Class III | |
| 8 | Booker (D-NJ) | Booker | Cory A. | D | NJ | 359 Dirksen Senate Office Building Washington DC 20510 | (202)224-3224 | https://www.booker.senate.gov/?p=contact | http://www.booker.senate.gov | Class II | |
| 9 | Boozman (R-AR) | Boozman | John | R | AR | 141 Hart Senate Office Building Washington DC 20510 | (202) 224-4843 | https://www.boozman.senate.gov/public/index.cfm/contact | http://www.boozman.senate.gov/ | Class III | |
| 10 | Boxer (D-CA) | Boxer | Barbara | D | CA | 112 Hart Senate Office Building Washington DC 20510 | (202) 224-3553 | https://www.boxer.senate.gov/?p=shareyourviews | http://www.boxer.senate.gov | Class III | |
| 11 | Brown (D-OH) | Brown | Sherrod | D | OH | 713 Hart Senate Office Building Washington DC 20510 | (202) 224-2315 | http://www.brown.senate.gov/contact/ | http://www.brown.senate.gov/ | Class I | |
| 12 | Burr (R-NC) | Burr | Richard | R | NC | 217 Russell Senate Office Building Washington DC 20510 | (202) 224-3154 | https://www.burr.senate.gov/contact/email | http://www.burr.senate.gov | Class III | |
| 13 | Cantwell (D-WA) | Cantwell | Maria | D | WA | 511 Hart Senate Office Building Washington DC 20510 | (202) 224-3441 | http://www.cantwell.senate.gov/public/index.cfm/email-maria | http://www.cantwell.senate.gov | Class I | |
| 14 | Capito (R-WV) | Capito | Shelley Moore | R | WV | 172 Russell Senate Office Building Washington DC 20510 | (202) 224-6472 | https://www.capito.senate.gov/contact/contact-shelley | http://www.capito.senate.gov | Class II | |
| 15 | Cardin (D-MD) | Cardin | Benjamin L. | D | MD | 509 Hart Senate Office Building Washington DC 20510 | (202) 224-4524 | http://www.cardin.senate.gov/contact/ | http://www.cardin.senate.gov/ | Class I | |
| 16 | Carper (D-DE) | Carper | Thomas R. | D | DE | 513 Hart Senate Office Building Washington DC 20510 | (202) 224-2441 | http://www.carper.senate.gov/public/index.cfm/email-senator-carper | http://www.carper.senate.gov | Class I | |
| 17 | Casey (D-PA) | Casey | Robert P., Jr. | D | PA | 393 Russell Senate Office Building Washington DC 20510 | (202) 224-6324 | https://www.casey.senate.gov/contact/ | http://www.casey.senate.gov/ | Class I | |
| 18 | Cassidy (R-LA) | Cassidy | Bill | R | LA | 703 Hart Senate Office Building Washington DC 20510 | (202) 224-5824 | https://www.cassidy.senate.gov/contact | http://www.cassidy.senate.gov | Class II | |
| 19 | Coats (R-IN) | Coats | Daniel | R | IN | 493 Russell Senate Office Building Washington DC 20510 | (202) 224-5623 | http://www.coats.senate.gov/contact/ | http://www.coats.senate.gov | Class III | |
| 20 | Cochran (R-MS) | Cochran | Thad | R | MS | 113 Dirksen Senate Office Building Washington DC 20510 | (202) 224-5054 | https://www.cochran.senate.gov/public/index.cfm/email-me | http://www.cochran.senate.gov | Class II | |
| 21 | Collins (R-ME) | Collins | Susan M. | R | ME | 413 Dirksen Senate Office Building Washington DC 20510 | (202) 224-2523 | http://www.collins.senate.gov/contact | http://www.collins.senate.gov | Class II | |
| 22 | Coons (D-DE) | Coons | Christopher A. | D | DE | 127A Russell Senate Office Building Washington DC 20510 | (202) 224-5042 | https://www.coons.senate.gov/contact | https://www.coons.senate.gov/contact | Class II | |
| 23 | Corker (R-TN) | Corker | Bob | R | TN | 425 Dirksen Senate Office Building Washington DC 20510 | (202) 224-3344 | https://www.corker.senate.gov/public/index.cfm/emailme | http://www.corker.senate.gov/ | Class I | |
| 24 | Cornyn (R-TX) | Cornyn | John | R | TX | 517 Hart Senate Office Building Washington DC 20510 | (202) 224-2934 | https://www.cornyn.senate.gov/contact | http://www.cornyn.senate.gov/< | Class II | Assistant Majority Leader |
| 25 | Cotton (R-AR) | Cotton | Tom | R | AR | 124 Russell Senate Office Building Washington DC 20510 | (202) 224-2353 | http://www.cotton.senate.gov/?p=contact | http://www.cotton.senate.gov | Class II | |
| 26 | Crapo (R-ID) | Crapo | Mike | R | ID | 239 Dirksen Senate Office Building Washington DC 20510 | (202) 224-6142 | http://www.crapo.senate.gov/contact/email.cfm | http://www.crapo.senate.gov | Class III | |
| 27 | Cruz (R-TX) | Cruz | Ted | R | TX | 404 Russell Senate Office Building Washington DC 20510 | (202) 224-5922 | http://www.cruz.senate.gov/?p=email_senator | http://www.cruz.senate.gov | Class I | |
| 28 | Daines (R-MT) | Daines | Steve | R | MT | 320 Hart Senate Office Building Washington DC 20510 | (202) 224-2651 | https://www.daines.senate.gov/connect/email-steve | http://www.daines.senate.gov | Class II | |
| 29 | Donnelly (D-IN) | Donnelly | Joe | D | IN | 720 Hart Senate Office Building Washington DC 20510 | (202) 224-4814 | https://www.donnelly.senate.gov/contact/email-joe | http://www.donnelly.senate.gov | Class I | |
| 30 | Durbin (D-IL) | Durbin | Richard J. | D | IL | 711 Hart Senate Office Building Washington DC 20510 | (202) 224-2152 | https://www.durbin.senate.gov/contact/ | http://www.durbin.senate.gov | Class II | Assistant Democratic Leader |