| 1 | Sat 5 Sep 2020 | 21-2 v Dagenham & RedbridgeHornchurch 1-2 Dagenham & Redbridge | Friendly |
| 2 | Tue 8 Sep 2020 | 31-3 v Maidstone UnitedHornchurch 1-3 Maidstone United | Friendly |
| 3 | Sat 12 Sep 2020 | 22-0 v Welling UnitedHornchurch 2-0 Welling United | Friendly |
| 4 | Tue 22 Sep 2020 | 23-0 v Bowers & PitseaBowers & Pitsea 0-3 Hornchurch | Emirates FA Cup First Qualifying Round |
| 5 | Sat 26 Sep 2020 | 20-1 v Bishop's StortfordBishop's Stortford 1-0 Hornchurch | Isthmian League - Premier Division |
| 6 | Tue 29 Sep 2020 | 21-1 v MargateMargate 1-1 Hornchurch | Isthmian League - Premier Division |
| 7 | Sat 10 Oct 2020 | 2 0-2 v KingstonianKingstonian 2-0 Hornchurch | Isthmian League - Premier Division |
| 8 | Tue 13 Oct 2020 | 22-2 v Hampton & Richmond BoroughHampton & Richmond Borough 2-2 Hornchurch | Emirates FA Cup Third Qualifying Round |
| 9 | Sat 17 Oct 2020 | 24-0 v Carshalton AthleticHornchurch 4-0 Carshalton Athletic | Isthmian League - Premier Division |
| 10 | Tue 20 Oct 2020 | 23-0 v CheshuntCheshunt 0-3 Hornchurch | Isthmian League - Premier Division |
| 11 | Sat 24 Oct 2020 | 21-1 v HorshamHornchurch 1-1 Horsham | Isthmian League - Premier Division |
| 12 | Tue 27 Oct 2020 | 2 3-1 v Haringey BoroughHornchurch 3-1 Haringey Borough | Isthmian League - Premier Division |
| 13 | Sat 31 Oct 2020 | 23-1 v Bowers & PitseaBowers & Pitsea 1-3 Hornchurch | Buildbase FA Trophy Third Qualifying Round |
| 14 | Tue 3 Nov 2020 | 21-2 v Folkestone InvictaFolkestone Invicta 2-1 Hornchurch | Isthmian League - Premier Division |
| 15 | Sat 5 Dec 2020 | 33-0 v Grays AthleticHornchurch 3-0 Grays Athletic | Friendly |
| 16 | Tue 8 Dec 2020 | 17 4-1 v Wingate & FinchleyHornchurch 4-1 Wingate & Finchley | Buildbase FA Trophy First Round |
| 17 | Tue 15 Dec 2020 | 3 1-0 v Tonbridge AngelsTonbridge Angels 0-1 Hornchurch | Buildbase FA Trophy Second Round |
| 18 | Sat 19 Dec 2020 | 32-1 v Dulwich HamletDulwich Hamlet 1-2 Hornchurch | Buildbase FA Trophy Third Round |
| 19 | Sat 27 Mar 2021 | 23-3 v Notts CountyNotts County 3-3 Hornchurch | Buildbase FA Trophy Semi Final |
| 20 | Sat 22 May 2021 | 23-1 v HerefordHereford 1-3 Hornchurch | Buildbase FA Trophy Final |
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