| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | Frank Fielding | 1988-04-04 | 180 | 76 | 2010 | ||
| GK | Mark Bunn | 1984-11-16 | 183 | 77 | 2017-06-30 | ||
| D | Gábor Gyepes | 1981-06-26 | 191 | 83 | |||
| D | Jason Crowe | 1978-09-30 | 175 | 67 | |||
| D | Kyle Walker | 1990-05-28 | 178 | 73 | 2022-06-30 | ||
| D | Liam Lloyd | 1986-11-23 | 175 | 73 | 2016-12-31 | ||
| M | Alex Dyer | 1990-06-01 | 177 | 74 | 2019-12-31 | ||
| M | Ikechi Anya | 1988-06-03 | 165 | 72 | 2020-06-30 | ||
| M | Ryan Gilligan | 1987-01-18 | 183 | 80 | 2017-12-31 | ||
| F | Aleksandar Prijovic | 1990-04-21 | 191 | 88 | 2019-06-30 | ||
| F | Leon Constantine | 1978-02-24 | 188 | 75 | 2010 | ||
| F | Nicholas Bignall | 1990-07-11 | 178 | 82 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Matt Grimes (M) | Northampton Town | Swansea City | Confirmed | |
| 30.Jun | Chris Long (F) | Northampton Town | Burnley FC | Confirmed | |
| 21.Jan | Kenji Gorré (F) | Northampton Town | Swansea City | Confirmed | |
| 29.Jul | Kenji Gorré (F) | Swansea City | Northampton Town | Confirmed | |
| 6.Aug | Ivan Toney (F) | Northampton Town | Newcastle United | Confirmed | |
| 10.Oct | Enda Stevens (D) | Aston Villa FC | Northampton Town | Confirmed | |
| 19.Aug | Ashley Corker (D) | Northampton Town | KuPS | Confirmed | |
| 30.Jul | Ryan Gilligan (M) | Northampton Town | Östersunds FK | Confirmed | |
| 1.Jan | Ben Harding (M) | Wycombe Wanderers FC | Northampton Town | Confirmed | |
| 22.Dec | Shane Higgs (GK) | Free Agent | Northampton Town | Confirmed |