| 1915 |  | Ship Purchase Act | |
From noon on Feb 8 until 6:00 p.m. on Feb 10. (54 hours)
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| 1927 | | Resolution to continue investigation of the Frank L. Smith-William S. Vare election cases | | From 11:00 a.m. on Mar 2 to 12:02 a.m. on Mar 4. (37 hours, 2 minutes) | | |
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| 1935 | | National Recovery Act Extension | | From noon on Jun 12 until 6:20 a.m. on Jun 13. (18 hours, 20 minutes) | | |
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| 1947 | | Veto of labor bill | | From noon on Jun 20 to 6:52 p.m. on Jun 21. (30 hours, 52 minutes) | | |
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| 1948 | | Closing session | | From 11:00 a.m. on Friday, Jun 18, to 7:14 a.m. on Sunday, Jun 20. (44 hours, 14 minutes) | | |
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| 1950 | | Closing session | | From 11:30 a.m. on Friday, Sep 22, to 5:23 p.m. on Saturday, Sep 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. |
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| 1952 | | Supplemental Appropriations for Fiscal Year 1953 | | From noon on Saturday, Jul 5, to 5:09 a.m. Sunday, Jul 6. (17 hours, 9 minutes) | | |
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| 1953 | | Tidelands bill | | From 11:00 a.m. on Friday, Apr 24, to 3:50 p.m. on Saturday, Apr 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. |
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| 1954 | | Atomic Energy bill | | From 10:00 a.m. on Wednesday, Jul 21, to 1:34 a.m. on Friday, Jul 23. (39 hours, 34 minutes) | | |
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| 1954 | | Atomic Energy bill | | From 2:00 a.m. on Friday, Jul 23 to 11:49 p.m. on Saturday, Jul 24. (45 hours, 49 minutes) | | |
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| 1954 | | Atomic Energy bill | | From 10:00 a.m. on Monday, Jul 26 to 9:56 p.m. on Tuesday, Jul 27. (35 hours, 56 minutes) | | |
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| 1957 | | Civil rights debate | | From 10:00 a.m. on Aug 28, to 12:59 a.m. on Aug 30. (38 hours, 59 minutes) | | Senator Strom Thurmond of South Carolina began his speech at 8:54 p.m. on Aug 28 and spoke until 9:12 p.m. on Aug 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. |
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| 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, Feb 29, to 5:31 p.m. on Saturday, Mar 5. (125 hours, 16 minutes; includes a 15-minute recess on Mar 2) | | The longest unbroken session during that period took 82 hours, 2 minutes, from Mar 2 to Mar 5. |
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| 1960 | | Sugar Act | | From 10:00 a.m. on Saturday, Jul 2, to 8:33 a.m. on Sunday, Jul 3. (22 hours, 33 minutes) | | |
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| 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, Aug 8, to 5:59 p.m. on Wednesday, Aug 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. |
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| 1964 | | Civil rights debate | | From 10:00 a.m. on Jun 9 to 9:51 a.m. on Jun 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 |
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| 1977 | | Natural Gas Policy Act | | From 9:00 a.m. on Tuesday, Sep 27, to 7:12 a.m. on Wednesday, Sep 28. (22 hours, 12 minutes) | | Senators Howard Metzenbaum (D-OH) and James Abourezk (D-SD) conducted a "dilatory tactic filibuster." |
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| 1978 | | Closing session | | From 9:00 a.m. on Saturday, Oct 14, to 7:16 p.m. on Sunday, Oct 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. |
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| 1980 | | Selective Service | | From 10:00 a.m. on Tuesday, Jun 20, to 6:43 p.m. on Wednesday, Jun 21. (32 hours, 43 minutes) | | |
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| 1981 | | Debt limit | | From 11:00 a.m. on Sep 28, to 10:26 a.m. on Sep 29. (23 hours, 26 minutes) | | Senator William Proxmire (D-WI) spoke for 16 hours, 12 minutes, from early evening on Sep 28 until mid-morning on Sep 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) |
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| 1981 | | Continuing Appropriations for Fiscal Year 1982 | | From 10:00 a.m. on Thursday, Nov 19, to 6:52 a.m. on Friday, Nov 20. (20 hours, 52 minutes) | | |
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| 1982 | | Continuing Appropriations for Fiscal Year 1983 | | From 9:45 a.m. on Thursday, Dec 16, to 11:36 p.m. on Friday, Dec 17. (37 hours, 51 minutes) | | |
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| 1984 | | Continuing Appropriations for Fiscal Year 1985 | | From 11:00 a.m. on Wednesday, Oct 3, to 9:32 a.m. on Thursday, Oct 4. (22 hours, 32 minutes) | | |
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| 1986 | | Public debt limit increase | | From 9:30 a.m. Aug 15 to 4:03 a.m. on Aug 16. (18 hours, 33 minutes) | | |
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| 1986 | | Veto of South African Sanction and Continuing Resolution | | From 8:30 a.m. on Oct 2 to 5:27 a.m. on Oct 3. (20 hours, 57 minutes) | | |
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| 1988 | | Senate Election Campaign Act | | From 10:00 a.m. on Tuesday, Feb 23, to 7:24 p.m. on Thursday, Feb 25. (57 hours, 24 minutes) | | |
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| 1992 | | Tax bill | | From 9:30 a.m. on Monday, Oct 5, to 7:05 p.m. on Tuesday, Oct 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 Oct 6; recessed again from 8:06 p.m. until 10:32 p.m.; adjourned until the next day at 10:47 p.m. |
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| 1994 | | Congressional Campaign Spending Limit and Election Reform Act | | From 10:00 a.m. on Sep 22 to 4:41 p.m. on Sep 23. (30 hours, 41 minutes) | | |
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| 2003 | | Judicial Nominations | | From 9:30 a.m. on Nov 12 to 3:06 p.m. on Nov 14. (53 hours, 36 minutes) [2] | | |
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| 2006 | | Tax and Trade package, and continuing resolution | | From 9:30 a.m. on Friday, Dec 8 to 4:40 a.m. on Saturday, Dec 9. (19 hours, 10 minutes) | | |
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| 2007 | | Iraq War Policy | | From 10:00 a.m. on Tuesday, Jul 17, until 5:09 p.m. on Wednesday, Jul 18. (31 hours, 9 minutes) | | |
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| 2012 | | Continuing Appropriations Resolution, 2013 | | From 12 p.m. on Friday, September 21, until 4:03 a.m. on Saturday, September 22.(14 hours, 3 minutes) | | |
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| 2013 | | Budget Resolution | | From 9 a.m. on Friday, March 22, until 5:22 a.m. on Saturday, March 23.(20 hours, 22 minutes) | | |
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| 2013 | | Continuing Appropriations Resolution, 2014 | | From 10 a.m. on Tuesday, September 24, until 8:11 p.m. on Wednesday, Spetember 25.(34 hours, 11 minutes) | | Senator Ted Cruz spoke for 21 hours and 19 minutes against the Affordable Care Act. |
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| 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) | | |
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| 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) | | |
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| 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) | | |
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| 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) | | |
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| 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. |
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| 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) | | |
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| 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. |
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