The Connacht Senior Cup is a knockout competition for Senior rugby union clubs in the Irish province of Connacht, under the auspices of The Connacht Branch IRFU. The Cup has been played for a total of 102 times, with twelve different cubs having won the trophy during that period.

Until 1928 all finals were played at the grounds of the then Galway Grammar School. From 1929 until the present the final is traditionally held at the Galway Sportsground on College Road, Galway.

Winners

• 34 – Queens College, Galway (7,) then as University College, Galway (27),
• 29 – Galwegians,
• 15 – Corinthians,
• 6 – Buccaneers,
• 5 – Athlone,
• 4 – Galway Town,
• 3 – Ballinasloe,
• 2 – Ballina,
• 1 – Galway Grammar School, Sligo, Loughrea, Connemara.

1890s

• 1896 Galway Town beat Queens College, Galway (9-0)
• 1897 Queens College, Galway beat Lancashire Fusiliers (9-0)
• 1898 Galway Grammar School beat Queens College, Galway (3-0)
• 1899 Queens College, Galway beat Galway Town (19-5)

1900s

• 1900 Not Known
• 1901 Not Known
• 1902 Not Known
• 1903 Queens College, Galway beat Galway Town (13-0, after Replay)
• 1904 Queens College, Galway beat Old Galwegians (3-0)
• 1905 Queens College, Galway beat Old Galwegians (N/K)
• 1906 Galway Town beat Queens College, Galway (3-0)
• 1907 Queens College, Galway''' beat Galway Town (11-3, after Replay)
• 1908 Queens College, Galway beat Galway Town (14-0)
• 1909 UCG (runners-up not recorded)

1910s

• 1910 UCG beat Old Galwegians (7-3)
• 1911 Galway Town (runners-up not recorded)
• 1912 UCG (runners-up not recorded)
• 1913 Galway Town beat UCG (5-3)
• 1914 Sligo beat Galway Town(9-3)
• 1915 No Competition
• 1916 No Competition
• 1917 No Competition
• 1918 No Competition
• 1919 No Competition

1920s

• 1920 No Competition
• 1921 No Competition
• 1922 Galway Town beat UCG (6-3)
• 1923 UCG beat Sligo (19-0)
• 1924 UCG beat Sligo (9-0)
• 1925 UCG beat Sligo (15-5)
• 1926 Galwegians beat UCG (8-3)
• 1927 Galwegians beat UCG (3-0)
• 1928 Galwegians beat UCG (22-3)
• 1929 Galwegians beat UCG (18-3)

1930s

• 1930 UCG beat Ballina (3-0)
• 1931 Loughrea beat Ballina (6-3)
• 1932 UCG beat Sligo (10/0)
• 1933 Galway Corinthians RFC
• 1934 Corinthians
• 1935 UCG
• 1936 UCG
• 1937 UCG
• 1938 Galwegians
• 1939 UCG

1940s

• 1940 UCG
• 1941 Corinthians
• 1942 UCG
• 1943 Galwegians
• 1944 UCG
• 1945 UCG
• 1946 UCG
• 1947 Corinthians
• 1948 Ballinasloe beat UCG
• 1949 Corinthians beat Galwegians

1950s

• 1950 Ballinasloe beat Galwegians
• 1951 Ballina
• 1952 Galwegians
• 1953 UCG
• 1954 Corinthians
• 1955 Athlone beat Galwegians
• 1956 Galwegians
• 1957 Galwegians
• 1958 Galwegians beat Westport
• 1959 Galwegians

1960s

• 1960 Galwegians
• 1961 UCG
• 1962 UCG beat Corinthians
• 1963 Galwegians beat UCG
• 1964 UCG beat Corinthians
• 1965 Galwegians beat UCG
• 1966 UCG
• 1967 UCG beat Westport
• 1968 Galwegians
• 1969 Galwegians beat UCG

1970s

• 1970 UCG beat Galwegians
• 1971 Galwegians
• 1972 Corinthians beat UCG
• 1973 Galwegians
• 1974 UCG beat Athlone
• 1975 Galwegians beat Ballinasloe
• 1976 Athlone beat Galwegians
• 1977 Athlone beat UCG
• 1978 Corinthians beat Athlone
• 1979 Ballina beat Athlone

1980s

• 1980 Galwegians beat Corinthians
• 1981 Galwegians beat Corinthians
• 1982 Corinthians beat Sligo
• 1983 Galwegians beat Corinthians
• 1984 Corinthians beat Athlone
• 1985 Corinthians beat Athlone
• 1986 Galwegians beat Athlone
• 1987 UCG beat Corinthians
• 1988 Corinthians beat Athlone
• 1989 UCG beat Galwegians

1990s

• 1990 Athlone beat Corinthians
• 1991 Athlone beat Galwegians
• 1992 Ballinasloe beat Sligo
• 1993 Corinthians beat Ballina
• 1994 Corinthians beat Connemara
• 1995 Buccaneers beat Galwegians
• 1996 Galwegians beat Connemara
• 1997 Galwegians beat Ballina
• 1998 Corinthians beat Galwegians
• 1999 Buccaneers beat Galwegians

2000s

• 2000 Buccaneers beat Ballina
• 2001 Galwegians beat Buccaneers
• 2002 Galwegians beat Buccaneers
• 2003 Connemara beat Buccaneers
• 2004 Galwegians beat Buccaneers
• 2005 Buccaneers beat Connemara
• 2006 Buccaneers beat Connemara
• 2007 Buccaneers beat Galwegians
• 2008 Galwegians beat Buccaneers 22-7