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| 1 NBA championship season: 2010-11 |
| Last NBA championship: 2010-11, 14 seasons ago |
| Best finish: |
| beat Miami in NBA Finals in 2010-11 season |
| TEAM | SEASON | RECORD | PERC | DIV STD | GB | CNF STD | PLAYOFFS |
| Dallas | 1980-81 | 15-67 | .183 | 6th Midwest | -37.0 | --- West | missed playoffs |
| Dallas | 1981-82 | 28-54 | .341 | 5th Midwest | -20.0 | --- West | missed playoffs |
| Dallas | 1982-83 | 38-44 | .463 | 4th Midwest | -15.0 | --- West | missed playoffs |
| Dallas | 1983-84 | 43-39 | .524 | 2nd Midwest | - 2.0 | 4th West | WSea LLAL |
| Dallas | 1984-85 | 44-38 | .537 | 3rd Midwest | - 8.0 | 4th West | LPor |
| Dallas | 1985-86 | 44-38 | .537 | 3rd Midwest | - 7.0 | 4th West | WUta LLAL |
| Dallas | 1986-87 | 55-27 | .671 | 1st Midwest | +11.0 | 2nd West | LSea |
| Dallas | 1987-88 | 53-29 | .646 | 2nd Midwest | - 1.0 | 3rd West | WHou WDen LLAL |
| Dallas | 1988-89 | 38-44 | .463 | 4th Midwest | -13.0 | --- West | missed playoffs |
| Dallas | 1989-90 | 47-35 | .573 | 3rd Midwest | - 9.0 | 6th West | LPor |
| Dallas | 1990-91 | 28-54 | .341 | 6th Midwest | -27.0 | --- West | missed playoffs |
| Dallas | 1991-92 | 22-60 | .268 | 5th Midwest | -33.0 | --- West | missed playoffs |
| Dallas | 1992-93 | 11-71 | .134 | 6th Midwest | -44.0 | --- West | missed playoffs |
| Dallas | 1993-94 | 13-69 | .159 | 6th Midwest | -45.0 | --- West | missed playoffs |
| Dallas | 1994-95 | 36-46 | .439 | 5th Midwest | -26.0 | --- West | missed playoffs |
| Dallas | 1995-96 | 26-56 | .317 | 6th Midwest | -33.0 | --- West | missed playoffs |
| Dallas | 1996-97 | 24-58 | .293 | 4th Midwest | -40.0 | --- West | missed playoffs |
| Dallas | 1997-98 | 20-62 | .244 | 5th Midwest | -42.0 | --- West | missed playoffs |
| Dallas | 1998-99 | 19-31 | .380 | 5th Midwest | -14.0 | --- West | missed playoffs |
| Dallas | 1999-00 | 40-42 | .488 | 4th Midwest | -15.0 | --- West | missed playoffs |
| Dallas | 2000-01 | 53-29 | .646 | 3rd Midwest | - 5.0 | 5th West | WUta LSA |
| Dallas | 2001-02 | 57-25 | .695 | 2nd Midwest | - 1.0 | 4th West | WMin LSac |
| Dallas | 2002-03 | 60-22 | .732 | 2nd Midwest | - 0.0 | 3rd West | WPor WSac LSA |
| Dallas | 2003-04 | 52-30 | .634 | 3rd Midwest | - 6.0 | 5th West | LSac |
| Dallas | 2004-05 | 58-24 | .707 | 2nd Southwest | - 1.0 | 4th West | WHou LPhx |
| Dallas | 2005-06 | 60-22 | .732 | 2nd Southwest | - 3.0 | 4th West | WMem WSA WPhx LMia |
| Dallas | 2006-07 | 67-15 | .817 | 1st Southwest | + 9.0 | 1st West | LGS |
| Dallas | 2007-08 | 51-31 | .622 | 4th Southwest | - 5.0 | 7th West | LNOH |
| Dallas | 2008-09 | 50-32 | .610 | 3rd Southwest | - 4.0 | 6th West | WSA LDen |
| Dallas | 2009-10 | 55-27 | .671 | 1st Southwest | + 5.0 | 2nd West | LSA |
| %Dallas | 2010-11 | 57-25 | .695 | 2nd Southwest | - 4.0 | 3rd West | WPor WLAL WOkC WMia |
| Dallas | 2011-12 | 36-30 | .545 | 3rd Southwest | -14.0 | 7th West | LOkC |
| Dallas | 2012-13 | 36-30 | .545 | 4th Southwest | -17.0 | --- West | missed playoffs |
| Dallas | 2013-14 | 49-33 | .598 | 4th Southwest | -13.0 | 8th West | LSA |
| Dallas | 2014-15 | 50-32 | .610 | 4th Southwest | - 6.0 | 7th West | LHou |
| Dallas | 2015-16 | 42-40 | .512 | 2nd Southwest | -25.0 | 6th West | LOkC |
| Dallas | 2016-17 | 33-49 | .402 | 5th Southwest | -28.0 | --- West | missed playoffs |
| Dallas | 2017-18 | 24-58 | .293 | 4th Southwest | -41.0 | --- West | missed playoffs |
| Dallas | 2018-19 | 33-49 | .402 | T3rd Southwest | -20.0 | --- West | missed playoffs |
| Dallas | 2019-20 | 43-32 | .573 | 2nd Southwest | - 2.5 | 7th West | LLAC |
| Dallas | 2020-21 | 42-30 | .583 | 1st Southwest | + 4.0 | 5th West | LLAC |
| Dallas | 2021-22 | 52-30 | .634 | 2nd Southwest | - 4.0 | 4th West | WUta WPhx LGS |
| Dallas | 2022-23 | 38-44 | .463 | 3rd Southwest | -13.0 | --- West | missed playoffs |
| Dallas | 2023-24 | 50-32 | .610 | 1st Southwest | + 1.0 | 5th West | WLAC WOkC WMin LBos |
| Dallas | 2024-25 | 39-43 | .476 | 3rd Southwest | -13.0 | 10th West | WSac LMem |