| 1 | Sat 14 Aug 2021 | 31-2 v Yate TownHarrow Borough 1-2 Yate Town | Southern League - Premier South |
| 2 | Tue 17 Aug 2021 | 33-0 v Hartley WintneyHartley Wintney 0-3 Harrow Borough | Southern League - Premier South |
| 3 | Sat 21 Aug 2021 | 31-2 v SalisburySalisbury 2-1 Harrow Borough | Southern League - Premier South |
| 4 | Sat 28 Aug 2021 | 30-4 v Poole TownHarrow Borough 0-4 Poole Town | Southern League - Premier South |
| 5 | Mon 30 Aug 2021 | 30-1 v HendonHendon 1-0 Harrow Borough | Southern League - Premier South |
| 6 | Tue 16 Nov 2021 | 31-4 v Metropolitan PoliceHarrow Borough 1-4 Metropolitan Police | Southern League - Premier South |
| 7 | Tue 23 Nov 2021 | 154-2 v Swindon SupermarineSwindon Supermarine 2-4 Harrow Borough | Southern League - Premier South |
| 8 | Sat 4 Dec 2021 | 31-3 v Dorchester TownDorchester Town 3-1 Harrow Borough | Southern League - Premier South |
| 9 | Tue 7 Dec 2021 | 140-0 v Chesham UnitedChesham United 0-0 Harrow Borough | Southern League - Premier South |
| 10 | Sat 11 Dec 2021 | 30-4 v Chesham UnitedHarrow Borough 0-4 Chesham United | Southern League - Premier South |
| 11 | Tue 14 Dec 2021 | 3 3-2 v Tiverton TownHarrow Borough 3-2 Tiverton Town | Southern League - Premier South |
| 12 | Mon 27 Dec 2021 | 32-2 v HendonHarrow Borough 2-2 Hendon | Southern League - Premier South |
| 13 | Sat 1 Jan 2022 | 31-2 v Walton CasualsWalton Casuals 2-1 Harrow Borough | Southern League - Premier South |
| 14 | Tue 11 Jan 2022 | 150-0 v Corinthian-CasualsCorinthian-Casuals 0-0 Harrow Borough | London County Cup First Round |
| 15 | Sat 29 Jan 2022 | 36-3 v Truro CityHarrow Borough 6-3 Truro City | Southern League - Premier South |
| 16 | Tue 1 Feb 2022 | 30-1 v Hayes & Yeading UnitedHarrow Borough 0-1 Hayes & Yeading United | Southern League - Premier South |
| 17 | Sat 5 Feb 2022 | 31-6 v Beaconsfield TownBeaconsfield Town 6-1 Harrow Borough | Southern League - Premier South |
| 18 | Sat 12 Feb 2022 | 30-1 v Kings LangleyHarrow Borough 0-1 Kings Langley | Southern League - Premier South |
| 19 | Tue 15 Feb 2022 | 32-4 v Hayes & Yeading UnitedHayes & Yeading United 4-2 Harrow Borough | Southern League - Premier South |
| 20 | Sat 26 Feb 2022 | 33-2 v Taunton TownHarrow Borough 3-2 Taunton Town | Southern League - Premier South |
| 21 | Sat 5 Mar 2022 | 32-2 v Swindon SupermarineHarrow Borough 2-2 Swindon Supermarine | Southern League - Premier South |
| 22 | Sat 12 Mar 2022 | 32-1 v Hartley WintneyHarrow Borough 2-1 Hartley Wintney | Southern League - Premier South |
| 23 | Sat 19 Mar 2022 | 3 1-2 v Tiverton TownTiverton Town 2-1 Harrow Borough | Southern League - Premier South |
| 24 | Sat 26 Mar 2022 | 31-1 v Merthyr TownHarrow Borough 1-1 Merthyr Town | Southern League - Premier South |
| 25 | Sat 2 Apr 2022 | 3 1-1 v Metropolitan PoliceMetropolitan Police 1-1 Harrow Borough | Southern League - Premier South |
| 26 | Tue 5 Apr 2022 | 34-1 v Wimborne TownWimborne Town 1-4 Harrow Borough | Southern League - Premier South |
| 27 | Sat 9 Apr 2022 | 30-0 v SalisburyHarrow Borough 0-0 Salisbury | Southern League - Premier South |
| 28 | Sat 16 Apr 2022 | 30-3 v Poole TownPoole Town 3-0 Harrow Borough | Southern League - Premier South |
| 29 | Mon 18 Apr 2022 | 30-0 v Walton CasualsHarrow Borough 0-0 Walton Casuals | Southern League - Premier South |
| 30 | Sat 23 Apr 2022 | 31-2 v Weston-super-MareWeston-super-Mare 2-1 Harrow Borough | Southern League - Premier South |
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