| 1 | Sat 10 Aug 2019 | 31-0 v Merthyr TownHarrow Borough 1-0 Merthyr Town | BetVictor Southern Premier South |
| 2 | Sat 17 Aug 2019 | 31-1 v Hartley WintneyHartley Wintney 1-1 Harrow Borough | BetVictor Southern Premier South |
| 3 | Mon 26 Aug 2019 | 32-1 v Walton CasualsWalton Casuals 1-2 Harrow Borough | BetVictor Southern Premier South |
| 4 | Sat 7 Sep 2019 | 35-0 v Binfield TownHarrow Borough 5-0 Binfield Town | Emirates FA Cup First Qualifying Round |
| 5 | Tue 17 Sep 2019 | 31-2 v Beaconsfield TownHarrow Borough 1-2 Beaconsfield Town | BetVictor Southern Premier South |
| 6 | Sat 26 Oct 2019 | 30-2 v AFC SudburyAFC Sudbury 2-0 Harrow Borough | Buildbase FA Trophy First Qualifying Round |
| 7 | Tue 29 Oct 2019 | 3 1-1 v Weston-super-MareWeston-super-Mare 1-1 Harrow Borough | BetVictor Southern Premier South |
| 8 | Sat 2 Nov 2019 | 32-1 v Dorchester TownDorchester Town 1-2 Harrow Borough | BetVictor Southern Premier South |
| 9 | Sat 9 Nov 2019 | 32-3 v Swindon SupermarineHarrow Borough 2-3 Swindon Supermarine | BetVictor Southern Premier South |
| 10 | Sat 16 Nov 2019 | 3 1-1 v FarnboroughFarnborough 1-1 Harrow Borough | BetVictor Southern Premier South |
| 11 | Thu 26 Dec 2019 | 31-0 v HendonHendon 0-1 Harrow Borough | BetVictor Southern Premier South |
| 12 | Wed 1 Jan 2020 | 32-0 v Walton CasualsHarrow Borough 2-0 Walton Casuals | BetVictor Southern Premier South |
| 13 | Sat 4 Jan 2020 | 32-2 v Merthyr TownMerthyr Town 2-2 Harrow Borough | BetVictor Southern Premier South |
| 14 | Sat 11 Jan 2020 | 33-2 v Hayes & Yeading UnitedHarrow Borough 3-2 Hayes & Yeading United | BetVictor Southern Premier South |
| 15 | Sat 18 Jan 2020 | 30-2 v Blackfield & LangleyBlackfield & Langley 2-0 Harrow Borough | BetVictor Southern Premier South |
| 16 | Sat 25 Jan 2020 | 31-4 v Hartley WintneyHarrow Borough 1-4 Hartley Wintney | BetVictor Southern Premier South |
| 17 | Sat 8 Feb 2020 | 30-0 v Poole TownHarrow Borough 0-0 Poole Town | BetVictor Southern Premier South |
| 18 | Sat 15 Feb 2020 | 32-2 v Chesham UnitedHarrow Borough 2-2 Chesham United | BetVictor Southern Premier South |
| 19 | Sat 22 Feb 2020 | 31-4 v Truro CityTruro City 4-1 Harrow Borough | BetVictor Southern Premier South |
| 20 | Sat 7 Mar 2020 | 33-1 v Metropolitan PoliceMetropolitan Police 1-3 Harrow Borough | BetVictor Southern Premier South |
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