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| 2 NFL championship season: 2013, 2025 |
| Last NFL championship: 2025, 0 seasons ago |
| Best finish: |
| beat Denver in Super Bowl in 2013 season |
| beat New England in Super Bowl in 2025 season |
| TEAM | SEAS | RECORD | PERC | DIV STAND | CNF STAND | PLAYOFFS |
| Seattle | 1976 | 2-12 | .143 | 5th NFC West | 14th NFC | missed playoffs |
| Seattle | 1977 | 5-9 | .357 | 4th AFC West | 11th AFC | missed playoffs |
| Seattle | 1978 | 9-7 | .562 | 3rd AFC West | T6th AFC | missed playoffs |
| Seattle | 1979 | 9-7 | .562 | 3rd AFC West | T6th AFC | missed playoffs |
| Seattle | 1980 | 4-12 | .250 | 5th AFC West | T13th AFC | missed playoffs |
| Seattle | 1981 | 6-10 | .375 | 5th AFC West | 11th AFC | missed playoffs |
| Seattle | 1982 | 4-5 | .444 | 3rd AFC West | T9th AFC | missed playoffs |
| Seattle | 1983 | 9-7 | .562 | 2nd AFC West | 4th AFC | WDen WMia LRai |
| Seattle | 1984 | 12-4 | .750 | 2nd AFC West | 4th AFC | WRai LMia |
| Seattle | 1985 | 8-8 | .500 | 3rd AFC West | T8th AFC | missed playoffs |
| Seattle | 1986 | 10-6 | .625 | 3rd AFC West | T6th AFC | missed playoffs |
| Seattle | 1987 | 9-6 | .600 | 2nd AFC West | 5th AFC | LHoO |
| Seattle | 1988 | 9-7 | .562 | 1st AFC West | 3rd AFC | bye LCin |
| Seattle | 1989 | 7-9 | .438 | 4th AFC West | 11th AFC | missed playoffs |
| Seattle | 1990 | 9-7 | .562 | 3rd AFC West | T7th AFC | missed playoffs |
| Seattle | 1991 | 7-9 | .438 | 4th AFC West | T8th AFC | missed playoffs |
| Seattle | 1992 | 2-14 | .143 | 5th AFC West | T13th AFC | missed playoffs |
| Seattle | 1993 | 6-10 | .375 | 5th AFC West | 11th AFC | missed playoffs |
| Seattle | 1994 | 6-10 | .375 | 5th AFC West | T11th AFC | missed playoffs |
| Seattle | 1995 | 8-8 | .500 | 3rd AFC West | T7th AFC | missed playoffs |
| Seattle | 1996 | 7-9 | .438 | 5th AFC West | T12th AFC | missed playoffs |
| Seattle | 1997 | 8-8 | .500 | 3rd AFC West | T8th AFC | missed playoffs |
| Seattle | 1998 | 8-8 | .500 | 3rd AFC West | T7th AFC | missed playoffs |
| Seattle | 1999 | 9-7 | .562 | 1st AFC West | 3rd AFC | LMia |
| Seattle | 2000 | 6-10 | .375 | 4th AFC West | 12th AFC | missed playoffs |
| Seattle | 2001 | 9-7 | .562 | 2nd AFC West | 7th AFC | missed playoffs |
| Seattle | 2002 | 7-9 | .438 | 3rd NFC West | T8th NFC | missed playoffs |
| Seattle | 2003 | 10-6 | .625 | 2nd NFC West | 5th NFC | LGB |
| Seattle | 2004 | 9-7 | .563 | 1st NFC West | 4th NFC | LStL |
| Seattle | 2005 | 13-3 | .813 | 1st NFC West | 1st NFC | bye WWsR WCar LPit |
| Seattle | 2006 | 9-7 | .563 | 1st NFC West | 4th NFC | WDal LChi |
| Seattle | 2007 | 10-6 | .625 | 1st NFC West | 3rd NFC | WWsR LGB |
| Seattle | 2008 | 4-12 | .250 | 3rd NFC West | 14th NFC | missed playoffs |
| Seattle | 2009 | 5-11 | .312 | 3rd NFC West | 12th NFC | missed playoffs |
| Seattle | 2010 | 7-9 | .438 | 1st NFC West | 4th NFC | WNO LChi |
| Seattle | 2011 | 7-9 | .438 | 3rd NFC West | 11th NFC | missed playoffs |
| Seattle | 2012 | 11-5 | .688 | 2nd NFC West | 5th NFC | WWsR LAtl |
| %Seattle | 2013 | 13-3 | .812 | 1st NFC West | 1st NFC | bye WNO WSF WDen |
| Seattle | 2014 | 12-4 | .750 | 1st NFC West | 1st NFC | bye WCar WGB LNE |
| Seattle | 2015 | 10-6 | .625 | 2nd NFC West | 5th NFC | WMin LCar |
| Seattle | 2016 | 10-5-1 | .656 | 1st NFC West | 3rd NFC | WDet LAtl |
| Seattle | 2017 | 9-7 | .563 | 2nd NFC West | T7th NFC | missed playoffs |
| Seattle | 2018 | 10-6 | .625 | 2nd NFC West | 5th NFC | LDal |
| Seattle | 2019 | 11-5 | .688 | 2nd NFC West | 5th NFC | WPhi LGB |
| Seattle | 2020 | 12-4 | .750 | 1st NFC West | 3rd NFC | LLAR |
| Seattle | 2021 | 7-10 | .412 | 4th NFC West | T10th NFC | missed playoffs |
| Seattle | 2022 | 9-8 | .529 | 2nd NFC West | 7th NFC | LSF |
| Seattle | 2023 | 9-8 | .529 | 3rd NFC West | T8th NFC | missed playoffs |
| Seattle | 2024 | 10-7 | .588 | 2nd NFC West | 8th NFC | missed playoffs |
| %Seattle | 2025 | 14-3 | .824 | 1st NFC West | 1st NFC | bye WSF WLAR WNE |