Championship   M. W D L goals
  at home 3 3 0 0 5 : 1
  Away 3 1 0 2 4 : 5
  6 4 0 2 9 : 6
FA Cup   M. W D L goals
  at home 1 0 0 1 1 : 2
  1 0 0 1 1 : 2
League Cup   M. W D L goals
  at home 3 3 0 0 7 : 1
  Away 1 0 0 1 0 : 1
  4 3 0 1 7 : 2
League One   M. W D L goals
  at home 2 0 0 2 1 : 3
  Away 2 1 0 1 2 : 3
  4 1 0 3 3 : 6
overall   M. W D L goals
  at home 9 6 0 3 14 : 7
  Away 6 2 0 4 6 : 9
  Neutral Place 0 0 0 0 0 : 0
  15 8 0 7 20 : 16
Championship
1966/1967 8. Round Northampton Town - Cardiff City 2:0
1966/1967 5. Round Cardiff City - Northampton Town 4:2
1964/1965 7. Round Cardiff City - Northampton Town 0:2
1964/1965 2. Round Northampton Town - Cardiff City 1:0
1963/1964 7. Round Cardiff City - Northampton Town 1:0
1963/1964 7. Round Northampton Town - Cardiff City 2:1
FA Cup
1937/1938 1. Round Northampton Town - Cardiff City 1:2
League Cup
2020/2021 1. Round Northampton Town - Cardiff City 3:0 (1:0)
2012/2013 1. Round Northampton Town - Cardiff City 2:1 (1:1)
1996/1997 1. Round Northampton Town - Cardiff City 2:0 (0:0)
1996/1997 1. Round Cardiff City - Northampton Town 1:0 (0:0)
League One
2002/2003 27. Round Northampton Town - Cardiff City 0:1 (0:0)
2002/2003 3. Round Cardiff City - Northampton Town 1:2 (1:1)
2001/2002 37. Round Northampton Town - Cardiff City 1:2 (1:2)
2001/2002 8. Round Cardiff City - Northampton Town 2:0 (1:0)

For games that were decided on penalties the score after 120 minutes will be included in the ranking