| RETURN TO LEAGUE LISTING | |||||||||||
| Year | Division | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 2004/2005 | Football League Championship | Watford | Gillingham | ||||||||
| Football League Championship | Gillingham | 0-0 | Watford | 02/11/2004 | 0 | 1 | 0 | 0 | 0 | ||
| 2003/2004 | English Division 1 | Gillingham | 1-0 | Watford | 26/12/2003 | 1 | 0 | 0 | 1 | 0 | |
| English Division 1 | Watford | 2-2 | Gillingham | 30/08/2003 | 0 | 1 | 0 | 2 | 2 | ||
| 2002/2003 | English Division 1 | Watford | 0-1 | Gillingham | 18/03/2003 | 1 | 0 | 0 | 1 | 0 | |
| English Division 1 | Gillingham | 3-0 | Watford | 19/10/2002 | 1 | 0 | 0 | 3 | 0 | ||
| 2001/2002 | English Division 1 | Watford | 2-3 | Gillingham | 21/04/2002 | 1 | 0 | 0 | 3 | 2 | |
| English Division 1 | Gillingham | 0-0 | Watford | 18/11/2001 | Live TV | 0 | 1 | 0 | 0 | 0 | |
| 2000/2001 | English Division 1 | Gillingham | 0-3 | Watford | 02/05/2001 | 0 | 0 | 1 | 0 | 3 | |
| English Division 1 | Watford | 0-0 | Gillingham | 17/10/2000 | 0 | 1 | 0 | 0 | 0 | ||
| 1997/1998 | English Division 2 | Watford | 0-2 | Gillingham | 08/02/1998 | Live TV | 1 | 0 | 0 | 2 | 0 |
| English Division 2 | Gillingham | 2-2 | Watford | 20/09/1997 | 0 | 1 | 0 | 2 | 2 | ||
| 1996/1997 | English Division 2 | Gillingham | 3-1 | Watford | 08/03/1997 | 1 | 0 | 0 | 3 | 1 | |
| English Division 2 | Watford | 0-0 | Gillingham | 21/12/1996 | 0 | 1 | 0 | 0 | 0 | ||
| 1978/1979 | English Division 3 (old) | Watford | 1-0 | Gillingham | 11/11/1978 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 (old) | Gillingham | 2-3 | Watford | 02/09/1978 | 0 | 0 | 1 | 2 | 3 | ||
| 1974/1975 | English Division 3 (old) | Gillingham | 2-1 | Watford | 08/03/1975 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 (old) | Watford | 0-0 | Gillingham | 25/09/1974 | 0 | 1 | 0 | 0 | 0 | ||
| 1968/1969 | English Division 3 (old) | Gillingham | 0-5 | Watford | 11/01/1969 | 0 | 0 | 1 | 0 | 5 | |
| English Division 3 (old) | Watford | 2-1 | Gillingham | 02/11/1968 | 0 | 0 | 1 | 1 | 2 | ||
| 1967/1968 | English Division 3 (old) | Watford | 3-0 | Gillingham | 04/05/1968 | 0 | 0 | 1 | 0 | 3 | |
| English Division 3 (old) | Gillingham | 0-0 | Watford | 24/04/1968 | 0 | 1 | 0 | 0 | 0 | ||
| 1966/1967 | English Division 3 (old) | Gillingham | 4-1 | Watford | 01/04/1967 | 1 | 0 | 0 | 4 | 1 | |
| English Division 3 (old) | Watford | 1-1 | Gillingham | 05/11/1966 | 0 | 1 | 0 | 1 | 1 | ||
| 1965/1966 | English Division 3 (old) | Watford | 1-0 | Gillingham | 12/03/1966 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 (old) | Gillingham | 2-2 | Watford | 18/09/1965 | 0 | 1 | 0 | 2 | 2 | ||
| 1964/1965 | English Division 3 (old) | Watford | 1-2 | Gillingham | 19/12/1964 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 (old) | Gillingham | 5-2 | Watford | 29/08/1964 | 1 | 0 | 0 | 5 | 2 | ||
| 1959/1960 | English Division 4 | Watford | 3-1 | Gillingham | 19/03/1960 | 0 | 0 | 1 | 1 | 3 | |
| English Division 4 | Gillingham | 2-0 | Watford | 31/10/1959 | 1 | 0 | 0 | 2 | 0 | ||
| 1958/1959 | English Division 4 | Gillingham | 2-1 | Watford | 11/04/1959 | 1 | 0 | 0 | 2 | 1 | |
| English Division 4 | Watford | 2-2 | Gillingham | 22/11/1958 | 0 | 1 | 0 | 2 | 2 | ||
| 1957/1958 | English Division 3 South | Watford | 3-0 | Gillingham | 29/03/1958 | 0 | 0 | 1 | 0 | 3 | |
| English Division 3 South | Gillingham | 1-1 | Watford | 14/12/1957 | 0 | 1 | 0 | 1 | 1 | ||
| 1956/1957 | English Division 3 South | Watford | 2-3 | Gillingham | 15/12/1956 | 1 | 0 | 0 | 3 | 2 | |
| English Division 3 South | Gillingham | 0-3 | Watford | 18/08/1956 | 0 | 0 | 1 | 0 | 3 | ||
| 1955/1956 | English Division 3 South | Watford | 0-1 | Gillingham | 24/12/1955 | 1 | 0 | 0 | 1 | 0 | |
| English Division 3 South | Gillingham | 3-0 | Watford | 27/08/1955 | 1 | 0 | 0 | 3 | 0 | ||
| 1954/1955 | English Division 3 South | Watford | 1-1 | Gillingham | 05/03/1955 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 South | Gillingham | 0-1 | Watford | 16/10/1954 | 0 | 0 | 1 | 0 | 1 | ||
| 1953/1954 | English Division 3 South | Gillingham | 2-3 | Watford | 23/01/1954 | 0 | 0 | 1 | 2 | 3 | |
| English Division 3 South | Watford | 6-1 | Gillingham | 12/09/1953 | 0 | 0 | 1 | 1 | 6 | ||
| 1952/1953 | English Division 3 South | Gillingham | 2-1 | Watford | 25/04/1953 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Watford | 0-0 | Gillingham | 16/04/1953 | 0 | 1 | 0 | 0 | 0 | ||
| 1951/1952 | English Division 3 South | Gillingham | 1-0 | Watford | 05/04/1952 | 1 | 0 | 0 | 1 | 0 | |
| English Division 3 South | Watford | 2-2 | Gillingham | 17/11/1951 | 0 | 1 | 0 | 2 | 2 | ||
| 1950/1951 | English Division 3 South | Gillingham | 3-1 | Watford | 13/01/1951 | 1 | 0 | 0 | 3 | 1 | |
| English Division 3 South | Watford | 5-0 | Gillingham | 09/09/1950 | 0 | 0 | 1 | 0 | 5 | ||
| 1937/1938 | English Division 3 South | Watford | 1-1 | Gillingham | 15/01/1938 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 South | Gillingham | 0-0 | Watford | 04/09/1937 | 0 | 1 | 0 | 0 | 0 | ||
| 1936/1937 | English Division 3 South | Gillingham | 2-1 | Watford | 02/01/1937 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Watford | 6-1 | Gillingham | 05/09/1936 | 0 | 0 | 1 | 1 | 6 | ||
| 1935/1936 | English Division 3 South | Gillingham | 0-0 | Watford | 11/04/1936 | 0 | 1 | 0 | 0 | 0 | |
| English Division 3 South | Watford | 1-2 | Gillingham | 07/12/1935 | 1 | 0 | 0 | 2 | 1 | ||
| 1934/1935 | English Division 3 South | Watford | 3-1 | Gillingham | 02/02/1935 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Gillingham | 1-2 | Watford | 22/09/1934 | 0 | 0 | 1 | 1 | 2 | ||
| 1933/1934 | English Division 3 South | Gillingham | 3-3 | Watford | 20/01/1934 | 0 | 1 | 0 | 3 | 3 | |
| English Division 3 South | Watford | 2-1 | Gillingham | 09/09/1933 | 0 | 0 | 1 | 1 | 2 | ||
| 1932/1933 | English Division 3 South | Gillingham | 3-3 | Watford | 25/02/1933 | 0 | 1 | 0 | 3 | 3 | |
| English Division 3 South | Watford | 2-0 | Gillingham | 15/10/1932 | 0 | 0 | 1 | 0 | 2 | ||
| 1931/1932 | English Division 3 South | Gillingham | 0-1 | Watford | 20/02/1932 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Watford | 2-0 | Gillingham | 10/10/1931 | 0 | 0 | 1 | 0 | 2 | ||
| 1930/1931 | English Division 3 South | Watford | 1-0 | Gillingham | 07/03/1931 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Gillingham | 4-2 | Watford | 01/11/1930 | 1 | 0 | 0 | 4 | 2 | ||
| 1929/1930 | English Division 3 South | Watford | 4-1 | Gillingham | 05/04/1930 | 0 | 0 | 1 | 1 | 4 | |
| English Division 3 South | Gillingham | 1-2 | Watford | 11/01/1930 | 0 | 0 | 1 | 1 | 2 | ||
| 1928/1929 | English Division 3 South | Gillingham | 0-0 | Watford | 24/04/1929 | 0 | 1 | 0 | 0 | 0 | |
| English Division 3 South | Watford | 1-0 | Gillingham | 15/09/1928 | 0 | 0 | 1 | 0 | 1 | ||
| 1927/1928 | English Division 3 South | Watford | 5-3 | Gillingham | 02/05/1928 | 0 | 0 | 1 | 3 | 5 | |
| English Division 3 South | Gillingham | 0-3 | Watford | 27/12/1927 | 0 | 0 | 1 | 0 | 3 | ||
| 1926/1927 | English Division 3 South | Gillingham | 3-0 | Watford | 26/02/1927 | 1 | 0 | 0 | 3 | 0 | |
| English Division 3 South | Watford | 4-0 | Gillingham | 09/10/1926 | 0 | 0 | 1 | 0 | 4 | ||
| 1925/1926 | English Division 3 South | Gillingham | 0-1 | Watford | 17/04/1926 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Watford | 3-1 | Gillingham | 05/12/1925 | 0 | 0 | 1 | 1 | 3 | ||
| 1924/1925 | English Division 3 South | Watford | 1-2 | Gillingham | 03/01/1925 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Gillingham | 0-0 | Watford | 06/09/1924 | 0 | 1 | 0 | 0 | 0 | ||
| 1923/1924 | English Division 3 South | Gillingham | 0-0 | Watford | 15/09/1923 | 0 | 1 | 0 | 0 | 0 | |
| English Division 3 South | Watford | 1-1 | Gillingham | 08/09/1923 | 0 | 1 | 0 | 1 | 1 | ||
| 1922/1923 | English Division 3 South | Watford | 5-2 | Gillingham | 28/10/1922 | 0 | 0 | 1 | 2 | 5 | |
| English Division 3 South | Gillingham | 1-4 | Watford | 21/10/1922 | 0 | 0 | 1 | 1 | 4 | ||
| 1921/1922 | English Division 3 South | Gillingham | 1-1 | Watford | 06/05/1922 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 South | Watford | 1-0 | Gillingham | 29/04/1922 | 0 | 0 | 1 | 0 | 1 | ||
| 1920/1921 | English Division 3 (old) | Gillingham | 1-1 | Watford | 16/03/1921 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 (old) | Watford | 3-1 | Gillingham | 01/01/1921 | 0 | 0 | 1 | 1 | 3 | ||
| Year | Competition | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 1976/1977 | FA Cup 1st Rd | Gillingham | 0-1 | Watford | 20/11/1976 | 0 | 0 | 1 | 0 | 1 | |
| 1969/1970 | FA Cup 5th Rd | Watford | 2-1 | Gillingham | 07/02/1970 | 0 | 0 | 1 | 1 | 2 | |
| 1936/1937 | Division 3 South Cup 2nd Rd | Watford | 3-2 | Gillingham | 28/10/1936 | 0 | 0 | 1 | 2 | 3 | |
| 1913/1914 | FA Cup 5th Qualifying Rd | Gillingham | 1-0 | Watford | 13/12/1913 | 1 | 0 | 0 | 1 | 0 | |
| League | W | D | L | GF | GA | ||||||
| Home | 15 | 15 | 12 | 60 | 55 | ||||||
| Away | 8 | 11 | 22 | 40 | 83 | ||||||