| RETURN TO LEAGUE LISTING | |||||||||||
| Year | Division | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 1998/1999 | English Division 2 | Northampton Town | 0-1 | Gillingham | 13/02/1999 | 1 | 0 | 0 | 1 | 0 | |
| English Division 2 | Gillingham | 2-3 | Northampton Town | 08/09/1998 | 0 | 0 | 1 | 2 | 3 | ||
| 1997/1998 | English Division 2 | Gillingham | 1-0 | Northampton Town | 24/02/1998 | 1 | 0 | 0 | 1 | 0 | |
| English Division 2 | Northampton Town | 2-1 | Gillingham | 18/10/1997 | 0 | 0 | 1 | 1 | 2 | ||
| 1995/1996 | English Division 3 | Northampton Town | 1-1 | Gillingham | 20/04/1996 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 | Gillingham | 0-0 | Northampton Town | 04/11/1995 | 0 | 1 | 0 | 0 | 0 | ||
| 1994/1995 | English Division 3 | Gillingham | 3-1 | Northampton Town | 18/02/1995 | 1 | 0 | 0 | 3 | 1 | |
| English Division 3 | Northampton Town | 2-0 | Gillingham | 14/01/1995 | 0 | 0 | 1 | 0 | 2 | ||
| 1993/1994 | English Division 3 | Northampton Town | 1-2 | Gillingham | 02/04/1994 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 | Gillingham | 1-0 | Northampton Town | 27/12/1993 | 1 | 0 | 0 | 1 | 0 | ||
| 1992/1993 | English Division 3 | Northampton Town | 2-2 | Gillingham | 06/02/1993 | 0 | 1 | 0 | 2 | 2 | |
| English Division 3 | Gillingham | 2-3 | Northampton Town | 15/08/1992 | 0 | 0 | 1 | 2 | 3 | ||
| 1991/1992 | English Division 4 | Northampton Town | 0-0 | Gillingham | 08/02/1992 | 0 | 1 | 0 | 0 | 0 | |
| English Division 4 | Gillingham | 3-1 | Northampton Town | 26/10/1991 | 1 | 0 | 0 | 3 | 1 | ||
| 1990/1991 | English Division 4 | Northampton Town | 2-1 | Gillingham | 06/04/1991 | 0 | 0 | 1 | 1 | 2 | |
| English Division 4 | Gillingham | 0-0 | Northampton Town | 29/12/1990 | 0 | 1 | 0 | 0 | 0 | ||
| 1988/1989 | English Division 3 (old) | Gillingham | 1-0 | Northampton Town | 01/04/1989 | 1 | 0 | 0 | 1 | 0 | |
| English Division 3 (old) | Northampton Town | 1-2 | Gillingham | 18/12/1988 | 1 | 0 | 0 | 2 | 1 | ||
| 1987/1988 | English Division 3 (old) | Gillingham | 1-2 | Northampton Town | 04/04/1988 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 (old) | Northampton Town | 2-1 | Gillingham | 21/11/1987 | 0 | 0 | 1 | 1 | 2 | ||
| 1976/1977 | English Division 3 (old) | Northampton Town | 1-2 | Gillingham | 12/02/1977 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 (old) | Gillingham | 1-1 | Northampton Town | 04/09/1976 | 0 | 1 | 0 | 1 | 1 | ||
| 1973/1974 | English Division 4 | Northampton Town | 0-0 | Gillingham | 03/03/1974 | 0 | 1 | 0 | 0 | 0 | |
| English Division 4 | Gillingham | 3-1 | Northampton Town | 26/12/1973 | 1 | 0 | 0 | 3 | 1 | ||
| 1972/1973 | English Division 4 | Northampton Town | 2-1 | Gillingham | 06/01/1973 | 0 | 0 | 1 | 1 | 2 | |
| English Division 4 | Gillingham | 1-3 | Northampton Town | 25/08/1972 | 0 | 0 | 1 | 1 | 3 | ||
| 1971/1972 | English Division 4 | Northampton Town | 6-1 | Gillingham | 01/04/1972 | 0 | 0 | 1 | 1 | 6 | |
| English Division 4 | Gillingham | 4-1 | Northampton Town | 27/12/1971 | 1 | 0 | 0 | 4 | 1 | ||
| 1968/1969 | English Division 3 (old) | Gillingham | 2-0 | Northampton Town | 25/01/1969 | 1 | 0 | 0 | 2 | 0 | |
| English Division 3 (old) | Northampton Town | 0-1 | Gillingham | 05/11/1968 | 1 | 0 | 0 | 1 | 0 | ||
| 1967/1968 | English Division 3 (old) | Northampton Town | 1-1 | Gillingham | 16/12/1967 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 (old) | Gillingham | 2-0 | Northampton Town | 19/08/1967 | 1 | 0 | 0 | 2 | 0 | ||
| 1960/1961 | English Division 4 | Gillingham | 0-1 | Northampton Town | 12/04/1961 | 0 | 0 | 1 | 0 | 1 | |
| English Division 4 | Northampton Town | 3-1 | Gillingham | 17/09/1960 | 0 | 0 | 1 | 1 | 3 | ||
| 1959/1960 | English Division 4 | Gillingham | 2-1 | Northampton Town | 16/09/1959 | 1 | 0 | 0 | 2 | 1 | |
| English Division 4 | Northampton Town | 2-1 | Gillingham | 10/09/1959 | 0 | 0 | 1 | 1 | 2 | ||
| 1958/1959 | English Division 4 | Northampton Town | 4-2 | Gillingham | 27/12/1958 | 0 | 0 | 1 | 2 | 4 | |
| English Division 4 | Gillingham | 4-1 | Northampton Town | 26/12/1958 | 1 | 0 | 0 | 4 | 1 | ||
| 1957/1958 | English Division 3 South | Gillingham | 1-2 | Northampton Town | 19/04/1958 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 South | Northampton Town | 3-1 | Gillingham | 27/03/1958 | 0 | 0 | 1 | 1 | 3 | ||
| 1956/1957 | English Division 3 South | Gillingham | 1-2 | Northampton Town | 26/01/1957 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 South | Northampton Town | 4-1 | Gillingham | 05/01/1957 | 0 | 0 | 1 | 1 | 4 | ||
| 1955/1956 | English Division 3 South | Northampton Town | 0-2 | Gillingham | 07/04/1956 | 1 | 0 | 0 | 2 | 0 | |
| English Division 3 South | Gillingham | 0-2 | Northampton Town | 26/11/1955 | 0 | 0 | 1 | 0 | 2 | ||
| 1954/1955 | English Division 3 South | Gillingham | 2-2 | Northampton Town | 26/02/1955 | 0 | 1 | 0 | 2 | 2 | |
| English Division 3 South | Northampton Town | 4-1 | Gillingham | 09/10/1954 | 0 | 0 | 1 | 1 | 4 | ||
| 1953/1954 | English Division 3 South | Gillingham | 2-1 | Northampton Town | 13/02/1954 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Northampton Town | 1-1 | Gillingham | 26/09/1953 | 0 | 1 | 0 | 1 | 1 | ||
| 1952/1953 | English Division 3 South | Gillingham | 1-1 | Northampton Town | 14/03/1953 | 0 | 1 | 0 | 1 | 1 | |
| English Division 3 South | Northampton Town | 3-1 | Gillingham | 25/10/1952 | 0 | 0 | 1 | 1 | 3 | ||
| 1951/1952 | English Division 3 South | Gillingham | 2-1 | Northampton Town | 26/01/1952 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Northampton Town | 2-1 | Gillingham | 22/09/1951 | 0 | 0 | 1 | 1 | 2 | ||
| 1950/1951 | English Division 3 South | Gillingham | 3-1 | Northampton Town | 24/03/1951 | 1 | 0 | 0 | 3 | 1 | |
| English Division 3 South | Northampton Town | 4-1 | Gillingham | 04/11/1950 | 0 | 0 | 1 | 1 | 4 | ||
| 1937/1938 | English Division 3 South | Gillingham | 2-1 | Northampton Town | 05/03/1938 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Northampton Town | 4-1 | Gillingham | 23/10/1937 | 0 | 0 | 1 | 1 | 4 | ||
| 1936/1937 | English Division 3 South | Northampton Town | 5-0 | Gillingham | 29/03/1937 | 0 | 0 | 1 | 0 | 5 | |
| English Division 3 South | Gillingham | 2-0 | Northampton Town | 26/03/1937 | 1 | 0 | 0 | 2 | 0 | ||
| 1935/1936 | English Division 3 South | Gillingham | 2-3 | Northampton Town | 28/12/1935 | 0 | 0 | 1 | 2 | 3 | |
| English Division 3 South | Northampton Town | 0-0 | Gillingham | 31/08/1935 | 0 | 1 | 0 | 0 | 0 | ||
| 1934/1935 | English Division 3 South | Northampton Town | 2-1 | Gillingham | 19/01/1935 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 South | Gillingham | 3-1 | Northampton Town | 08/09/1934 | 1 | 0 | 0 | 3 | 1 | ||
| 1933/1934 | English Division 3 South | Northampton Town | 1-0 | Gillingham | 21/04/1934 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Gillingham | 5-1 | Northampton Town | 11/04/1934 | 1 | 0 | 0 | 5 | 1 | ||
| 1932/1933 | English Division 3 South | Gillingham | 5-1 | Northampton Town | 08/04/1933 | 1 | 0 | 0 | 5 | 1 | |
| English Division 3 South | Northampton Town | 1-0 | Gillingham | 14/01/1933 | 0 | 0 | 1 | 0 | 1 | ||
| 1931/1932 | English Division 3 South | Northampton Town | 1-0 | Gillingham | 26/12/1931 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Gillingham | 3-2 | Northampton Town | 25/12/1931 | 1 | 0 | 0 | 3 | 2 | ||
| 1930/1931 | English Division 3 South | Northampton Town | 0-1 | Gillingham | 17/01/1931 | 1 | 0 | 0 | 1 | 0 | |
| English Division 3 South | Gillingham | 0-2 | Northampton Town | 13/09/1930 | 0 | 0 | 1 | 0 | 2 | ||
| 1929/1930 | English Division 3 South | Gillingham | 5-2 | Northampton Town | 15/02/1930 | 1 | 0 | 0 | 5 | 2 | |
| English Division 3 South | Northampton Town | 3-1 | Gillingham | 12/10/1929 | 0 | 0 | 1 | 1 | 3 | ||
| 1928/1929 | English Division 3 South | Northampton Town | 1-0 | Gillingham | 30/03/1929 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Gillingham | 2-1 | Northampton Town | 17/11/1928 | 1 | 0 | 0 | 2 | 1 | ||
| 1927/1928 | English Division 3 South | Northampton Town | 1-0 | Gillingham | 11/02/1928 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Gillingham | 1-3 | Northampton Town | 01/10/1927 | 0 | 0 | 1 | 1 | 3 | ||
| 1926/1927 | English Division 3 South | Gillingham | 1-2 | Northampton Town | 07/05/1927 | 0 | 0 | 1 | 1 | 2 | |
| English Division 3 South | Northampton Town | 2-1 | Gillingham | 18/12/1926 | 0 | 0 | 1 | 1 | 2 | ||
| 1925/1926 | English Division 3 South | Northampton Town | 1-2 | Gillingham | 28/12/1925 | 1 | 0 | 0 | 2 | 1 | |
| English Division 3 South | Gillingham | 1-1 | Northampton Town | 30/09/1925 | 0 | 1 | 0 | 1 | 1 | ||
| 1924/1925 | English Division 3 South | Gillingham | 0-1 | Northampton Town | 28/02/1925 | 0 | 0 | 1 | 0 | 1 | |
| English Division 3 South | Northampton Town | 1-0 | Gillingham | 25/10/1924 | 0 | 0 | 1 | 0 | 1 | ||
| 1923/1924 | English Division 3 South | Northampton Town | 2-0 | Gillingham | 13/10/1923 | 0 | 0 | 1 | 0 | 2 | |
| English Division 3 South | Gillingham | 1-1 | Northampton Town | 06/10/1923 | 0 | 1 | 0 | 1 | 1 | ||
| 1922/1923 | English Division 3 South | Gillingham | 0-3 | Northampton Town | 06/09/1922 | 0 | 0 | 1 | 0 | 3 | |
| English Division 3 South | Northampton Town | 1-0 | Gillingham | 28/08/1922 | 0 | 0 | 1 | 0 | 1 | ||
| 1921/1922 | English Division 3 South | Northampton Town | 3-1 | Gillingham | 27/12/1921 | 0 | 0 | 1 | 1 | 3 | |
| English Division 3 South | Gillingham | 3-2 | Northampton Town | 26/12/1921 | 1 | 0 | 0 | 3 | 2 | ||
| 1920/1921 | English Division 3 (old) | Northampton Town | 2-0 | Gillingham | 27/12/1920 | 0 | 0 | 1 | 0 | 2 | |
| English Division 3 (old) | Gillingham | 2-5 | Northampton Town | 25/12/1920 | 0 | 0 | 1 | 2 | 5 | ||
| Year | Competition | Home | Away | Date | Win | Draw | Loss | Gills Gls | Away Gls | ||
| 2004/2005 | League Cup 1st Rd | Gillingham | 1-2 | Northampton Town | 25/08/2004 | 0 | 0 | 1 | 1 | 2 | |
| 1992/1993 | League Cup 1st Rd 2nd Leg | Northampton Town | 0-2 | Gillingham | 09/10/1992 | 1 | 0 | 0 | 2 | 0 | |
| League Cup 1st Rd 1st Leg | Gillingham | 2-1 | Northampton Town | 18/08/1992 | 1 | 0 | 0 | 2 | 1 | ||
| 1986/1987 | League Cup 1st Rd 2nd Leg | Northampton Town | 2-2 | Gillingham | 03/09/1986 | 0 | 1 | 0 | 2 | 2 | |
| League Cup 1st Rd 1st Leg | Gillingham | 1-0 | Northampton Town | 25/08/1986 | 1 | 0 | 0 | 1 | 0 | ||
| AM Cup Southern Section | Gillingham | 1-0 | Northampton Town | 16/12/1986 | 1 | 0 | 0 | 1 | 0 | ||
| 1985/1986 | FA Cup 1st Rd | Gillingham | 3-0 | Northampton Town | 16/11/1985 | 1 | 0 | 0 | 3 | 0 | |
| 1982/1983 | FA Cup 2nd Rd Replay | Northampton Town | 3-2 | Gillingham | 14/12/1982 | 0 | 0 | 1 | 2 | 3 | |
| FA Cup 2nd Rd | Gillingham | 1-1 | Northampton Town | 11/12/1982 | 0 | 1 | 0 | 1 | 1 | ||
| 1920/1921 | FA Cup 6th Qualifying Rd | Northampton Town | 3-1 | Gillingham | 18/12/1920 | 0 | 0 | 1 | 1 | 3 | |
| 1905/1906 | FA Cup 1st Rd | Gillingham | 2-1 | Northampton Town | 13/01/1906 | 1 | 0 | 0 | 2 | 1 | |
| League | W | D | L | GF | GA | ||||||
| Home | 23 | 7 | 15 | 83 | 63 | ||||||
| Away | 8 | 7 | 30 | 38 | 84 | ||||||