| 1 | Tue 22 Aug 2017 | 71-3 v Metropolitan PoliceHarrow Borough 1-3 Metropolitan Police | Velocity Trophy First Round |
| 2 | Sat 2 Sep 2017 | 141-2 v Enfield TownEnfield Town 2-1 Harrow Borough | Emirates FA Cup First Qualifying Round |
| 3 | Tue 12 Sep 2017 | 16 1-2 v Staines TownStaines Town 2-1 Harrow Borough | Bostik League Premier Division |
| 4 | Sat 23 Sep 2017 | 21-1 v MargateMargate 1-1 Harrow Borough | Bostik League Premier Division |
| 5 | Tue 26 Sep 2017 | 20-1 v Dulwich HamletHarrow Borough 0-1 Dulwich Hamlet | Bostik League Premier Division |
| 6 | Sat 30 Sep 2017 | 21-1 v Lowestoft TownLowestoft Town 1-1 Harrow Borough | Bostik League Premier Division |
| 7 | Tue 3 Oct 2017 | 23-0 v Wingate & FinchleyHarrow Borough 3-0 Wingate & Finchley | Bostik League Premier Division |
| 8 | Sat 7 Oct 2017 | 72-0 v KingstonianHarrow Borough 2-0 Kingstonian | Bostik League Premier Division |
| 9 | Sat 28 Oct 2017 | 2 1-1 v Haringey BoroughHarrow Borough 1-1 Haringey Borough | Buildbase FA Trophy First Qualifying Round |
| 10 | Mon 30 Oct 2017 | 20-1 v Haringey BoroughHaringey Borough 1-0 Harrow Borough | Buildbase FA Trophy First Qualifying Round |
| 11 | Sat 4 Nov 2017 | 22-5 v Tooting & Mitcham UnitedTooting & Mitcham United 5-2 Harrow Borough | Bostik League Premier Division |
| 12 | Sat 11 Nov 2017 | 20-2 v ThurrockThurrock 2-0 Harrow Borough | Bostik League Premier Division |
| 13 | Tue 14 Nov 2017 | 20-2 v Dulwich HamletDulwich Hamlet 2-0 Harrow Borough | Bostik League Premier Division |
| 14 | Sat 18 Nov 2017 | 23-4 v Dorking WanderersHarrow Borough 3-4 Dorking Wanderers | Bostik League Premier Division |
| 15 | Tue 21 Nov 2017 | 2 1-2 v Staines TownHarrow Borough 1-2 Staines Town | Bostik League Premier Division |
| 16 | Sat 25 Nov 2017 | 22-2 v WorthingWorthing 2-2 Harrow Borough | Bostik League Premier Division |
| 17 | Tue 28 Nov 2017 | 20-2 v Billericay TownHarrow Borough 0-2 Billericay Town | Bostik League Premier Division |
| 18 | Sat 2 Dec 2017 | 23-0 v Metropolitan PoliceHarrow Borough 3-0 Metropolitan Police | Bostik League Premier Division |
| 19 | Sat 9 Dec 2017 | 23-1 v Folkestone InvictaFolkestone Invicta 1-3 Harrow Borough | Bostik League Premier Division |
| 20 | Sat 16 Dec 2017 | 20-5 v LeistonHarrow Borough 0-5 Leiston | Bostik League Premier Division |
| 21 | Sat 23 Dec 2017 | 21-2 v Tonbridge AngelsTonbridge Angels 2-1 Harrow Borough | Bostik League Premier Division |
| 22 | Tue 26 Dec 2017 | 20-4 v HendonHarrow Borough 0-4 Hendon | Bostik League Premier Division |
| 23 | Sat 30 Dec 2017 | 71-2 v LeatherheadHarrow Borough 1-2 Leatherhead | Bostik League Premier Division |
| 24 | Sat 6 Jan 2018 | 23-2 v Needham MarketHarrow Borough 3-2 Needham Market | Bostik League Premier Division |
| 25 | Sat 13 Jan 2018 | 23-2 v Burgess Hill TownBurgess Hill Town 2-3 Harrow Borough | Bostik League Premier Division |
| 26 | Sat 27 Jan 2018 | 20-4 v MargateHarrow Borough 0-4 Margate | Bostik League Premier Division |
| 27 | Sat 10 Feb 2018 | 22-0 v ThurrockHarrow Borough 2-0 Thurrock | Bostik League Premier Division |
| 28 | Sat 17 Feb 2018 | 2 0-1 v Metropolitan PoliceMetropolitan Police 1-0 Harrow Borough | Bostik League Premier Division |
| 29 | Sat 24 Feb 2018 | 21-0 v WorthingHarrow Borough 1-0 Worthing | Bostik League Premier Division |
| 30 | Sat 10 Mar 2018 | 20-3 v Folkestone InvictaHarrow Borough 0-3 Folkestone Invicta | Bostik League Premier Division |
| 31 | Sat 24 Mar 2018 | 21-0 v KingstonianKingstonian 0-1 Harrow Borough | Bostik League Premier Division |
| 32 | Wed 28 Mar 2018 | 20-2 v Billericay TownBillericay Town 2-0 Harrow Borough | Bostik League Premier Division |
| 33 | Sat 31 Mar 2018 | 21-0 v MersthamMerstham 0-1 Harrow Borough | Bostik League Premier Division |
| 34 | Mon 2 Apr 2018 | 25-0 v Enfield TownHarrow Borough 5-0 Enfield Town | Bostik League Premier Division |
| 35 | Sat 7 Apr 2018 | 2 1-1 v Brightlingsea RegentBrightlingsea Regent 1-1 Harrow Borough | Bostik League Premier Division |
| 36 | Tue 10 Apr 2018 | 20-3 v LeistonLeiston 3-0 Harrow Borough | Bostik League Premier Division |
| 37 | Thu 12 Apr 2018 | 26-0 v Lowestoft TownHarrow Borough 6-0 Lowestoft Town | Bostik League Premier Division |
| 38 | Sat 14 Apr 2018 | 21-1 v Tooting & Mitcham UnitedHarrow Borough 1-1 Tooting & Mitcham United | Bostik League Premier Division |
| 39 | Sat 21 Apr 2018 | 21-0 v Needham MarketNeedham Market 0-1 Harrow Borough | Bostik League Premier Division |
| 40 | Tue 24 Apr 2018 | 24-0 v Dorking WanderersDorking Wanderers 0-4 Harrow Borough | Bostik League Premier Division |
| 41 | Sat 28 Apr 2018 | 23-2 v Burgess Hill TownHarrow Borough 3-2 Burgess Hill Town | Bostik League Premier Division |
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