| 1 | Tue 1 Aug 2017 | 24-0 v Beaconsfield TownHarrow Borough 4-0 Beaconsfield Town | Friendly |
| 2 | Sat 12 Aug 2017 | 32-1 v Harlow TownHarrow Borough 2-1 Harlow Town | Bostik League Premier Division |
| 3 | Tue 15 Aug 2017 | 23-1 v Wingate & FinchleyWingate & Finchley 1-3 Harrow Borough | Bostik League Premier Division |
| 4 | Tue 22 Aug 2017 | 21-3 v Metropolitan PoliceHarrow Borough 1-3 Metropolitan Police | Velocity Trophy First Round |
| 5 | Sat 26 Aug 2017 | 22-0 v Tonbridge AngelsHarrow Borough 2-0 Tonbridge Angels | Bostik League Premier Division |
| 6 | Mon 28 Aug 2017 | 30-6 v HendonHendon 6-0 Harrow Borough | Bostik League Premier Division |
| 7 | Sat 2 Sep 2017 | 31-2 v Enfield TownEnfield Town 2-1 Harrow Borough | Emirates FA Cup First Qualifying Round |
| 8 | Sat 9 Sep 2017 | 32-2 v MersthamHarrow Borough 2-2 Merstham | Bostik League Premier Division |
| 9 | Tue 3 Oct 2017 | 173-0 v Wingate & FinchleyHarrow Borough 3-0 Wingate & Finchley | Bostik League Premier Division |
| 10 | Sat 7 Oct 2017 | 22-0 v KingstonianHarrow Borough 2-0 Kingstonian | Bostik League Premier Division |
| 11 | Sat 14 Oct 2017 | 21-2 v Harlow TownHarlow Town 2-1 Harrow Borough | Bostik League Premier Division |
| 12 | Sat 21 Oct 2017 | 21-2 v Brightlingsea RegentHarrow Borough 1-2 Brightlingsea Regent | Bostik League Premier Division |
| 13 | Mon 30 Oct 2017 | 30-1 v Haringey BoroughHaringey Borough 1-0 Harrow Borough | Buildbase FA Trophy First Qualifying Round |
| 14 | Tue 26 Dec 2017 | 140-4 v HendonHarrow Borough 0-4 Hendon | Bostik League Premier Division |
| 15 | Sat 30 Dec 2017 | 21-2 v LeatherheadHarrow Borough 1-2 Leatherhead | Bostik League Premier Division |
| 16 | Mon 1 Jan 2018 | 20-3 v Enfield TownEnfield Town 3-0 Harrow Borough | Bostik League Premier Division |
| 17 | Sat 13 Jan 2018 | 123-2 v Burgess Hill TownBurgess Hill Town 2-3 Harrow Borough | Bostik League Premier Division |
| 18 | Sat 27 Jan 2018 | 160-4 v MargateHarrow Borough 0-4 Margate | Bostik League Premier Division |
| 19 | Sat 10 Feb 2018 | 52-0 v ThurrockHarrow Borough 2-0 Thurrock | Bostik League Premier Division |
| 20 | Sat 17 Feb 2018 | 60-1 v Metropolitan PoliceMetropolitan Police 1-0 Harrow Borough | Bostik League Premier Division |
| 21 | Sat 24 Feb 2018 | 51-0 v WorthingHarrow Borough 1-0 Worthing | Bostik League Premier Division |
| 22 | Sat 10 Mar 2018 | 50-3 v Folkestone InvictaHarrow Borough 0-3 Folkestone Invicta | Bostik League Premier Division |
| 23 | Sat 24 Mar 2018 | 41-0 v KingstonianKingstonian 0-1 Harrow Borough | Bostik League Premier Division |
| 24 | Wed 28 Mar 2018 | 60-2 v Billericay TownBillericay Town 2-0 Harrow Borough | Bostik League Premier Division |
| 25 | Sat 31 Mar 2018 | 51-0 v MersthamMerstham 0-1 Harrow Borough | Bostik League Premier Division |
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