| 1998-12-28 | NorthamptonvFulhamLeague One · England | 1–1 | League One · England |
| 1998-12-26 | Notts CountyvNorthamptonLeague One · England | 3–1 | League One · England |
| 1998-12-19 | BurnleyvNorthamptonLeague One · England | 0–2 | League One · England |
| 1998-12-12 | NorthamptonvChesterfieldLeague One · England | 1–0 | League One · England |
| 1998-11-28 | YorkvNorthamptonLeague One · England | 1–1 | League One · England |
| 1998-11-21 | NorthamptonvReadingLeague One · England | 0–1 | League One · England |
| 1998-11-10 | ColchestervNorthamptonLeague One · England | 1–0 | League One · England |
| 1998-11-07 | NorthamptonvWycombeLeague One · England | 1–1 | League One · England |
| 1998-10-31 | MacclesfieldvNorthamptonLeague One · England | 0–1 | League One · England |
| 1998-10-24 | NorthamptonvPrestonLeague One · England | 1–1 | League One · England |
| 1998-10-20 | LutonvNorthamptonLeague One · England | 1–0 | League One · England |
| 1998-10-17 | BournemouthvNorthamptonLeague One · England | 1–1 | League One · England |
| 1998-10-10 | NorthamptonvBristol RvsLeague One · England | 3–1 | League One · England |
| 1998-10-03 | WiganvNorthamptonLeague One · England | 1–0 | League One · England |
| 1998-09-27 | NorthamptonvMan CityLeague One · England | 2–2 | League One · England |
| 1998-09-19 | MillwallvNorthamptonLeague One · England | 2–1 | League One · England |
| 1998-09-12 | NorthamptonvOldhamLeague One · England | 1–1 | League One · England |
| 1998-09-08 | GillinghamvNorthamptonLeague One · England | 2–3 | League One · England |
| 1998-09-05 | BlackpoolvNorthamptonLeague One · England | 2–1 | League One · England |
| 1998-08-31 | NorthamptonvLincolnLeague One · England | 0–0 | League One · England |
| 1998-08-29 | WrexhamvNorthamptonLeague One · England | 1–0 | League One · England |
| 1998-08-22 | NorthamptonvNotts CountyLeague One · England | 1–1 | League One · England |
| 1998-08-15 | WalsallvNorthamptonLeague One · England | 0–0 | League One · England |
| 1998-08-08 | NorthamptonvStokeLeague One · England | 1–3 | League One · England |
| 1998-05-02 | YorkvNorthamptonLeague One · England | 0–0 | League One · England |
| 1998-04-25 | NorthamptonvFulhamLeague One · England | 1–0 | League One · England |
| 1998-04-18 | PlymouthvNorthamptonLeague One · England | 1–3 | League One · England |
| 1998-04-13 | NorthamptonvPrestonLeague One · England | 2–2 | League One · England |
| 1998-04-11 | ChesterfieldvNorthamptonLeague One · England | 2–1 | League One · England |
| 1998-04-04 | NorthamptonvBurnleyLeague One · England | 0–1 | League One · England |
| 1998-03-28 | WatfordvNorthamptonLeague One · England | 1–1 | League One · England |
| 1998-03-21 | BrentfordvNorthamptonLeague One · England | 0–0 | League One · England |
| 1998-03-14 | NorthamptonvBlackpoolLeague One · England | 2–0 | League One · England |
| 1998-03-07 | Bristol RvsvNorthamptonLeague One · England | 0–2 | League One · England |
| 1998-03-03 | NorthamptonvWrexhamLeague One · England | 0–1 | League One · England |
| 1998-02-28 | NorthamptonvGrimsbyLeague One · England | 2–1 | League One · England |
| 1998-02-24 | GillinghamvNorthamptonLeague One · England | 1–0 | League One · England |
| 1998-02-21 | MillwallvNorthamptonLeague One · England | 0–0 | League One · England |
| 1998-02-14 | NorthamptonvSouthendLeague One · England | 3–1 | League One · England |
| 1998-02-10 | NorthamptonvWycombeLeague One · England | 2–0 | League One · England |
| 1998-02-07 | WiganvNorthamptonLeague One · England | 1–1 | League One · England |
| 1998-01-31 | NorthamptonvOldhamLeague One · England | 0–0 | League One · England |
| 1998-01-24 | Bristol CityvNorthamptonLeague One · England | 0–0 | League One · England |
| 1998-01-17 | NorthamptonvCarlisleLeague One · England | 2–1 | League One · England |
| 1998-01-10 | BournemouthvNorthamptonLeague One · England | 3–0 | League One · England |