| Year | Subject | Length | Note |
|---|---|---|---|
| 1915 | Ship Purchase Act | From noon on February 8 until 6:00 p.m. on February 10. (54 hours) | — |
| 1927 | Resolution to continue investigation of the Frank L. Smith-William S. Vare election cases | From 11:00 a.m. on March 2 to 12:02 a.m. on March 4. (37 hours, 2 minutes) | — |
| 1935 | National Recovery Act Extension | From noon on June 12 until 6:20 a.m. on June 13. (18 hours, 20 minutes) | — |
| 1947 | Veto of labor bill | From noon on June 20 to 6:52 p.m. on June 21. (30 hours, 52 minutes) | — |
| 1948 | Closing session | From 11:00 a.m. on Friday, June 18, to 7:14 a.m. on Sunday, June 20. (44 hours, 14 minutes) | — |
| 1950 | Closing session | From 11:30 a.m. on Friday, September 22, to 5:23 p.m. on Saturday, September 23. (29 hours, 53 minutes) | This was the session in which Senator William Langer (R-ND) collapsed during a filibuster on the veto of the Communist registration bill. |
| 1952 | Supplemental Appropriations for Fiscal Year 1953 | From noon on Saturday, July 5, to 5:09 a.m. Sunday, July 6. (17 hours, 9 minutes) | — |
| 1953 | Tidelands bill | From 11:00 a.m. on Friday, April 24, to 3:50 p.m. on Saturday, April 25. (28 hours, 50 minutes) | During this session, Senator Wayne Morse (R/I/D-OR) broke the then-existing record for the longest Senate speech, taking the floor at 11:40 a.m. and speaking for 22 hours, 26 minutes. The Senate then took up and passed rent control, after which Senator James E. Murray (R-MT) spoke for four hours. |
| 1954 | Atomic Energy bill | From 10:00 a.m. on Wednesday, July 21, to 1:34 a.m. on Friday, July 23. (39 hours, 34 minutes) | — |
| 1954 | Atomic Energy bill | From 2:00 a.m. on Friday, July 23 to 11:49 p.m. on Saturday, July 24. (45 hours, 49 minutes) | — |
| 1954 | Atomic Energy bill | From 10:00 a.m. on Monday, July 26 to 9:56 p.m. on Tuesday, July 27. (35 hours, 56 minutes) | — |
| 1957 | Civil rights debate | From 10:00 a.m. on August 28, to 12:59 a.m. on August 30. (38 hours, 59 minutes) | Senator Strom Thurmond of South Carolina began his speech at 8:54 p.m. on August 28 and spoke until 9:12 p.m. on August 29 (24 hours, 18 minutes). Interruptions for other business totaled 1 hour 18 minutes. This speech broke Senator Morse's record for the longest Senate speech. |
| 1960 | Civil rights (a bill to lease a building at Fort Crowder, MO, was used as vehicle for civil rights amendments). | From noon on Monday, February 29, to 5:31 p.m. on Saturday, March 5. (125 hours, 16 minutes; includes a 15-minute recess on March 2) | The longest unbroken session during that period took 82 hours, 2 minutes, from March 2 to March 5. |
| 1960 | Sugar Act | From 10:00 a.m. on Saturday, July 2, to 8:33 a.m. on Sunday, July 3. (22 hours, 33 minutes) | — |
| 1961 | Nomination of Lawrence J. O'Conner, Jr. of Texas to be a member of the Federal Power Commission | From 10:00 a.m. on Tuesday, August 8, to 5:59 p.m. on Wednesday, August 9. (31 hours, 59 minutes) | Senator William Proxmire (D-WI), who objected to the nomination, held the floor for much of this time, yielding for the transaction of other business with the understanding that he would not lose the floor. |
| 1964 | Civil rights debate | From 10:00 a.m. on June 9 to 9:51 a.m. on June 10. (23 hours, 51 minutes) | Senator Robert C. Byrd (D-WV) began a speech at 7:38 p.m. and spoke for 14 hours and 13 minutes |
| 1977 | Natural Gas Policy Act | From 9:00 a.m. on Tuesday, September 27, to 7:12 a.m. on Wednesday, September 28. (22 hours, 12 minutes) | Senators Howard Metzenbaum (D-OH) and James Abourezk (D-SD) conducted a "dilatory tactic filibuster." |
| 1978 | Closing session | From 9:00 a.m. on Saturday, October 14, to 7:16 p.m. on Sunday, October 15. (34 hours, 16 minutes) | The Senate passed many bills, but the two main items were the conference reports on energy tax and income tax. |
| 1980 | Selective Service | From 10:00 a.m. on Tuesday, June 20, to 6:43 p.m. on Wednesday, June 21. (32 hours, 43 minutes) | — |
| 1981 | Debt limit | From 11:00 a.m. on September 28, to 10:26 a.m. on September 29. (23 hours, 26 minutes) | Senator William Proxmire (D-WI) spoke for 16 hours, 12 minutes, from early evening on September 28 until mid-morning on September 29 against allowing the national debt to go over $1 trillion. Four minutes after recessing, at 10:30 a.m., the Senate reconvened, adjourning at 10:16 p.m. (11 hours, 46 minutes) |
| 1981 | Continuing Appropriations for Fiscal Year 1982 | From 10:00 a.m. on Thursday, November 19, to 6:52 a.m. on Friday, November 20. (20 hours, 52 minutes) | — |
| 1982 | Continuing Appropriations for Fiscal Year 1983 | From 9:45 a.m. on Thursday, December 16, to 11:36 p.m. on Friday, December 17. (37 hours, 51 minutes) | — |
| 1984 | Continuing Appropriations for Fiscal Year 1985 | From 11:00 a.m. on Wednesday, October 3, to 9:32 a.m. on Thursday, October 4. (22 hours, 32 minutes) | — |
| 1986 | Public debt limit increase | From 9:30 a.m. August 15 to 4:03 a.m. on August 16. (18 hours, 33 minutes) | — |
| 1986 | Veto of South African Sanction and Continuing Resolution | From 8:30 a.m. on October 2 to 5:27 a.m. on October 3. (20 hours, 57 minutes) | — |
| 1988 | Senate Election Campaign Act | From 10:00 a.m. on Tuesday, February 23, to 7:24 p.m. on Thursday, February 25. (57 hours, 24 minutes) | — |
| 1992 | Tax bill | From 9:30 a.m. on Monday, October 5, to 7:05 p.m. on Tuesday, October 6. (33 hours, 35 minutes) | During this time, Senator Alphonse D'Amato (R-NY) spoke for 15 hours and 14 minutes in support of an amendment to the bill. The Senate then recessed for one hour and reconvened at 8:05 p.m. on October 6; recessed again from 8:06 p.m. until 10:32 p.m.; adjourned until the next day at 10:47 p.m. |
| 1994 | Congressional Campaign Spending Limit and Election Reform Act | From 10:00 a.m. on September 22 to 4:41 p.m. on September 23. (30 hours, 41 minutes) | — |
| 2003 | Judicial Nominations | From 9:30 a.m. on November 12 to 3:06 p.m. on November 14. (53 hours, 36 minutes) 2 | — |
| 2006 | Tax and Trade package, and continuing resolution | From 9:30 a.m. on Friday, December 8 to 4:40 a.m. on Saturday, December 9. (19 hours, 10 minutes) | — |
| 2007 | Iraq War Policy | From 10:00 a.m. on Tuesday, July 17, until 5:09 p.m. on Wednesday, July 18. (31 hours, 9 minutes) | — |
| 2012 | Continuing Appropriations Resolution, 2013 | From 12:00 p.m. on Friday, September 21, until 4:03 a.m. on Saturday, September 22. (14 hours, 3 minutes) | — |
| 2013 | Budget Resolution | From 9 a.m. on Friday, March 22, until 5:22 a.m. on Saturday, March 23. (20 hours, 22 minutes) | — |
| 2013 | Continuing Appropriations Resolution, 2014 | From 10 a.m. on Tuesday, September 24, until 8:11 p.m. on Wednesday, September 25. (34 hours, 11 minutes) | Senator Ted Cruz spoke for 21 hours and 19 minutes against the Affordable Care Act. |
| 2013 | Post-cloture debate on executive and judicial nominations | From 2:00 p.m. on Wednesday, December 11, until 2:11 p.m. on Friday, December 13, 2013. (48 hours, 11 minutes) | — |
| 2014 | Climate change | From 4:00 p.m., Monday, March 10, until 8:54 a.m. on Tuesday, March 11, 2014. (16 hours, 54 minutes) | — |
| 2015 | Budget resolution | From 9:30 a.m. on Thursday, March 26, until 4:23 a.m. on Friday, March 27. (18 hours, 53 minutes) | — |
| 2016 | Continuing appropriations resolution, 2017 | From 10:00 a.m. on Friday, December 9, until 6:39 a.m. on Saturday, December 10. (20 hours, 39 minutes) | — |
| 2017 | Cabinet nominations | From 12:00 p.m. on Monday February 6, until 9:05 p.m. on Wednesday, February 8. (57 hours, 5 minutes) | Democrats used post-cloture debate time on a number of nominations to speak against those nominations. |
| 2017 | Cabinet nominations | From 10:00 a.m. on Thursday, February 16, until 1:54 p.m. on Friday, February 17. (27 hours, 54 minutes) | — |
| 2017 | Neil Gorsuch nomination | From 10:00 a.m. on Tuesday, April 4, until 11:28 p.m. on Wednesday, April 5. (37 hours, 28 minutes) | Senator Jeff Merkley of Oregon spoke for 15 hours, 26 minutes against the Gorsuch nomination. |
| 2020 | Amy Coney Barrett Nomination | From 12:00 p.m. on Sunday, October 25, until 8:45 p.m. on Monday, October 26. (32 hours, 45 minutes) | — |
| 2021 | Budget resolution | From 10:00 a.m. on Thursday, February 4 to 5:38 a.m. on Friday, February 5. (19 hours, 38 minutes) | — |
| 2021 | American Rescue Plan Act of 2021 | From 9:00 a.m. on Friday, March 5 to 1:05 p.m. on Saturday, March 6. (28 hours, 5 minutes) | A vote-arama took place, with 37 votes held on the legislation. |
| 2021 | Budget resolution | From 9:30 a.m. on Tuesday, August 10 to 5:56 a.m. on Wednesday, August 11. (20 hours, 26 minutes) | A vote-arama took place, with 43 votes held on the legislation. |
| 2022 | Budget reconciliation | From 12:00 p.m. on Saturday, August 6 to 3:42 p.m. on Sunday, August 7. (27 hours, 42 minutes) | A vote-arama took place, with 39 votes held on the legislation. |
