San Francisco 49ers records

Best seasons

Highest regular-season win percentage

1. 1984 15–1
2. 1989 14–2
3. 1990 14–2
4. 1992 14–2
5. 1987 13–2

Worst seasons

Lowest regular-season win percentage

1. 1978 2–14
2. 1979 2–14
3. 2004 2–14
4. 2016 2–14
5. 1963 2–12

Best starts

Wins to open a season

1. 10 to start 1948
2. 10 to start 1990
3. 8 to start 2019
4. 6 to start 1984
5. 6 to start 2026

Worst starts

Losses to open a season

1. 9 to start 2017
2. 7 to start 1979
3. 5 to start 1950
4. 5 to start 1963
5. 5 to start 1977

Undefeated seasons

Regular seasons finished undefeated

None on record.

Win streaks

Consecutive wins

1. 15 1989–1990
2. 15 2022–2023
3. 11 1997
4. 10 1948
5. 10 1994

Losing streaks

Consecutive losses

1. 13 2016
2. 10 2016–2017
3. 9 1978
4. 8 1978–1979
5. 8 1980

Biggest wins

Largest margins of victory

1. 49–0 Detroit Lions 1961
2. 48–0 Los Angeles Rams 1987
3. 55–10 Denver Broncos 1989
4. 48–3 Tampa Bay Buccaneers 2011
5. 51–7 Buffalo Bills 1949

Worst losses

Largest margins of defeat

1. 7–56 Los Angeles Rams 1958
2. 3–49 New York Giants 1986
3. 14–59 Dallas Cowboys 1980
4. 3–45 Detroit Lions 1967
5. 20–61 Chicago Bears 1965

Championship games

Seasons that reached the final

1. 2023 lost Super Bowl
2. 2019 lost Super Bowl
3. 2012 lost Super Bowl
4. 1994 won Super Bowl
5. 1989 won Super Bowl
6. 1988 won Super Bowl
7. 1984 won Super Bowl
8. 1981 won Super Bowl
9. 1949 lost AAFC Championship

Ties

Games that ended level

1. 24–24 St. Louis Rams 2012
2. 10–10 Atlanta Falcons 1986
3. 20–20 New Orleans Saints 1972
4. 20–20 New Orleans Saints 1970
5. 24–24 Dallas Cowboys 1969
6. 17–17 Washington Redskins 1969
7. 20–20 Los Angeles Rams 1968
8. 30–30 Chicago Bears 1966