Below is a list of the seasons that the Sydney Roosters have competed in since 1908.
| Season | Wins | Draws | Losses | Regular Season Result | Final Season Result |
|---|---|---|---|---|---|
| 1908 | 9 | 0 | 2 | 2nd from 9 | Runners-up |
| 1909 | 5 | 0 | 6 | 4th from 8 | Semi-finals |
| 1910 | 9 | 2 | 3 | 3rd from 8 | 3rd |
| 1911 | 12 | 2 | 3 | 2nd from 8 | Premiers |
| 1912 | 13 | 0 | 1 | 1st from 8 | Premiers |
| 1913 | 12 | 0 | 2 | 1st from 8 | Premiers |
| 1914 | 8 | 0 | 6 | 3rd from 8 | 3rd |
| 1915 | 6 | 0 | 8 | 5th from 8 | 5th |
| 1916 | 7 | 2 | 5 | 4th from 8 | 4th |
| 1917 | 7 | 0 | 7 | 6th from 8 | 6th |
| 1918 | 8 | 0 | 6 | 5th from 8 | 5th |
| 1919 | 9 | 2 | 3 | 2nd from 8 | Runners-up |
| 1920 | 8 | 0 | 6 | 6th from 9 | 6th |
| 1921 | 6 | 1 | 1 | 2nd from 9 | Runners-up |
| 1922 | 9 | 2 | 5 | 3rd from 9 | 3rd |
| 1923 | 14 | 0 | 3 | 1st from 9 | Premiers |
| 1924 | 3 | 0 | 5 | 7th from 9 | 7th |
| 1925 | 4 | 0 | 8 | 8th from 9 | 8th |
| 1926 | 9 | 1 | 7 | 3rd from 9 | Semi-finals |
| 1927 | 8 | 2 | 7 | 4th from 9 | Semi-finals |
| 1928 | 12 | 0 | 2 | 2nd from 9 | Runners-up |
| 1929 | 4 | 2 | 10 | 7th from 9 | 7th |
| 1930 | 11 | 0 | 4 | 2nd from 8 | Semi-finals |
| 1931 | 12 | 0 | 4 | 1st from 8 | Runners-up |
| 1932 | 9 | 0 | 6 | 3rd from 8 | Semi-finals |
| 1933 | 8 | 1 | 6 | 2nd from 8 | Semi-finals |
| 1934 | 13 | 0 | 4 | 1st from 8 | Runners-up |
| 1935 | 17 | 0 | 1 | 1st from 9 | Premiers |
| 1936 | 13 | 2 | 0 | 1st from 9 | Premiers |
| 1937 | 6 | 2 | 0 | 1st from 9 | Premiers |
| 1938 | 7 | 3 | 6 | 4th from 8 | Runners-up |
| 1939 | 8 | 0 | 6 | 5th from 8 | 5th |
| 1940 | 11 | 1 | 4 | 1st from 8 | Premiers |
| 1941 | 10 | 0 | 6 | 1st from 8 | Runners-up |
| 1942 | 9 | 0 | 7 | 4th from 8 | Semi-finals |
| 1943 | 4 | 0 | 10 | 6th from 8 | 6th |
| 1944 | 4 | 0 | 10 | 7th from 8 | 7th |
| 1945 | 13 | 0 | 3 | 1st from 8 | Premiers |
| 1946 | 8 | 0 | 6 | 5th from 8 | 5th |
| 1947 | 5 | 1 | 12 | 8th from 10 | 8th |
| 1948 | 7 | 2 | 9 | 6th from 10 | 6th |
| 1949 | 3 | 1 | 14 | 10th from 10 | 10th |
| 1950 | 7 | 0 | 11 | 7th from 10 | 7th |
| 1951 | 9 | 0 | 9 | 5th from 10 | 5th |
| 1952 | 6 | 0 | 12 | 8th from 10 | 8th |
| 1953 | 10 | 1 | 8 | 4th from 10 | Semi-finals |
| 1954 | 3 | 1 | 14 | 9th from 10 | 9th |
| 1955 | 8 | 1 | 9 | 6th from 10 | 6th |
| 1956 | 5 | 1 | 12 | 9th from 10 | 9th |
| 1957 | 9 | 0 | 9 | 8th from 10 | 8th |
| 1958 | 8 | 0 | 10 | 7th from 10 | 7th |
| 1959 | 6 | 0 | 12 | 8th from 10 | 8th |
| 1960 | 14 | 0 | 9 | 3rd from 10 | Runners-up |
| 1961 | 9 | 1 | 8 | 5th from 10 | 5th |
| 1962 | 9 | 1 | 8 | 5th from 10 | 5th |
| 1963 | 3 | 0 | 15 | 10th from 10 | 10th |
| 1964 | 2 | 0 | 16 | 9th from 10 | 9th |
| 1965 | 3 | 1 | 14 | 10th from 10 | 10th |
| 1966 | 0 | 0 | 18 | 10th from 10 | 10th |
| 1967 | 13 | 2 | 8 | 4th from 12 | Semi-finals |
| 1968 | 14 | 1 | 8 | 4th from 12 | Semi-finals |
| 1969 | 8 | 1 | 13 | 9th from 12 | 9th |
| 1970 | 13 | 0 | 9 | 5th from 12 | 5th |
| 1971 | 9 | 1 | 12 | 9th from 12 | 9th |
| 1972 | 18 | 1 | 6 | 2nd from 12 | Runners-up |
| 1973 | 12 | 0 | 10 | 6th from 12 | 6th |
| 1974 | 21 | 0 | 4 | 1st from 12 | Premiers |
| 1975 | 22 | 0 | 3 | 1st from 12 | Premiers |
| 1976 | 13 | 1 | 9 | 4th from 12 | Semi-finals |
| 1977 | 16 | 1 | 8 | 3rd from 12 | Semi-finals |
| 1978 | 13 | 0 | 9 | 6th from 12 | 6th |
| 1979 | 9 | 1 | 12 | 8th from 12 | 8th |
| 1980 | 15 | 2 | 8 | 1st from 12 | Runners-up |
| 1981 | 16 | 0 | 8 | 1st from 12 | Semi-finals |
| 1982 | 17 | 2 | 10 | 4th from 14 | Semi-finals |
| 1983 | 14 | 1 | 12 | 6th from 14 | 6th |
| 1984 | 5 | 1 | 18 | 12th from 13 | 12th |
| 1985 | 10 | 3 | 11 | 7th from 13 | 7th |
| 1986 | 10 | 0 | 14 | 9th from 13 | 9th |
| 1987 | 16 | 1 | 10 | 2nd from 13 | Semi-finals |
| 1988 | 6 | 3 | 13 | 12th from 16 | 12th |
| 1989 | 9 | 1 | 12 | 11th from 16 | 11th |
| 1990 | 6 | 1 | 15 | 14th from 16 | 14th |
| 1991 | 9 | 1 | 12 | 11th from 16 | 11th |
| 1992 | 12 | 0 | 10 | 6th from 16 | 6th |
| 1993 | 11 | 1 | 10 | 8th from 16 | 8th |
| 1994 | 6 | 1 | 15 | 14th from 16 | 14th |
| 1995 | 12 | 0 | 10 | 9th from 20 | 9th |
| 1996 | 15 | 1 | 8 | 4th from 20 | Semi-finals |
| 1997 | 15 | 1 | 9 | 5th from 12 | Preliminary Finals |
| 1998 | 18 | 0 | 9 | 6th from 20 | Preliminary Finals |
| 1999 | 16 | 0 | 10 | 4th from 17 | Semi-finals |
| 2000 | 18 | 0 | 12 | 2nd from 14 | Runners-up |
| 2001 | 13 | 1 | 13 | 6th from 14 | Semi-finals |
| 2002 | 19 | 1 | 8 | 4th from 15 | Premiers |
| 2003 | 19 | 0 | 8 | 2nd from 15 | Runners-up |
| 2004 | 21 | 0 | 6 | 1st from 15 | Runners-up |
| 2005 | 11 | 0 | 13 | 9th from 15 | 9th |
| 2006 | 8 | 0 | 16 | 14th from 15 | 14th |
| 2007 | 10 | 1 | 13 | 10th from 16 | 10th |
| 2008 | 15 | 0 | 11 | 4th from 16 | Semi-finals |
| 2009 | 5 | 0 | 19 | 16th from 16 | 16th |
| 2010 | 17 | 0 | 11 | 6th from 16 | Runners-up |
| 2011 | 10 | 0 | 14 | 11th from 16 | 11th |
| 2012 | 8 | 1 | 15 | 13th from 16 | 13th |
| 2013 | 21 | 0 | 6 | 1st from 16 | Premiers |
| 2014 | 17 | 0 | 10 | 1st from 16 | Preliminary Finals |
| 2015 | 19 | 0 | 8 | 1st from 16 | Preliminary Finals |
| 2016 | 6 | 0 | 18 | 15th from 16 | 15th |
| 2017 | 18 | 0 | 8 | 2nd from 16 | Preliminary Finals |
| 2018 | 19 | 0 | 8 | 1st from 16 | Premiers |
| 2019 | 20 | 0 | 7 | 2nd from 16 | Premiers |
