| 1 | Sat 12 Sep 2020 | 61-1 v Langney WanderersLangney Wanderers 1-1 Harrow Borough | Emirates FA Cup Preliminary Round |
| 2 | Sat 19 Sep 2020 | 50-1 v Truro CityTruro City 1-0 Harrow Borough | Southern League - Premier South |
| 3 | Mon 21 Sep 2020 | 52-0 v Beaconsfield TownBeaconsfield Town 0-2 Harrow Borough | Emirates FA Cup First Qualifying Round |
| 4 | Sat 26 Sep 2020 | 51-2 v SalisburyHarrow Borough 1-2 Salisbury | Southern League - Premier South |
| 5 | Tue 29 Sep 2020 | 52-5 v Metropolitan PoliceMetropolitan Police 5-2 Harrow Borough | Southern League - Premier South |
| 6 | Sat 3 Oct 2020 | 51-5 v Cray Valley PMHarrow Borough 1-5 Cray Valley PM | Emirates FA Cup Second Qualifying Round |
| 7 | Tue 6 Oct 2020 | 61-2 v Chesham UnitedHarrow Borough 1-2 Chesham United | Southern League - Premier South |
| 8 | Sat 10 Oct 2020 | 51-1 v Weston-super-MareHarrow Borough 1-1 Weston-super-Mare | Southern League - Premier South |
| 9 | Sat 17 Oct 2020 | 52-2 v Gosport BoroughGosport Borough 2-2 Harrow Borough | Southern League - Premier South |
| 10 | Mon 26 Oct 2020 | 54-1 v Beaconsfield TownBeaconsfield Town 1-4 Harrow Borough | Southern League - Premier South |
| 11 | Sat 31 Oct 2020 | 51-4 v Burgess Hill TownBurgess Hill Town 4-1 Harrow Borough | Buildbase FA Trophy Third Qualifying Round |
| 12 | Sat 12 Dec 2020 | 53-0 v Chalfont St PeterHarrow Borough 3-0 Chalfont St Peter | Friendly |
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