| 1 | Sat 14 Aug 2021 | 3 0-3 v CheshuntCheshunt 3-0 East Thurrock United | Isthmian League - Premier Division |
| 2 | Sat 21 Aug 2021 | 32-2 v Bognor Regis TownEast Thurrock United 2-2 Bognor Regis Town | Isthmian League - Premier Division |
| 3 | Sat 28 Aug 2021 | 32-1 v Bowers & PitseaBowers & Pitsea 1-2 East Thurrock United | Isthmian League - Premier Division |
| 4 | Mon 30 Aug 2021 | 31-1 v Brightlingsea RegentEast Thurrock United 1-1 Brightlingsea Regent | Isthmian League - Premier Division |
| 5 | Sat 4 Sep 2021 | 3 3-1 v Cambridge CityCambridge City 1-3 East Thurrock United | Emirates FA Cup First Qualifying Round |
| 6 | Sat 11 Sep 2021 | 32-3 v WorthingWorthing 3-2 East Thurrock United | Isthmian League - Premier Division |
| 7 | Tue 14 Sep 2021 | 3 1-1 v Folkestone InvictaEast Thurrock United 1-1 Folkestone Invicta | Isthmian League - Premier Division |
| 8 | Tue 21 Sep 2021 | 33-2 v Needham MarketNeedham Market 2-3 East Thurrock United | Emirates FA Cup Second Qualifying Round Replay |
| 9 | Sat 25 Sep 2021 | 31-5 v Haringey BoroughHaringey Borough 5-1 East Thurrock United | Isthmian League - Premier Division |
| 10 | Sat 2 Oct 2021 | 30-4 v Boston UnitedBoston United 4-0 East Thurrock United | Emirates FA Cup Third Qualifying Round |
| 11 | Tue 12 Oct 2021 | 30-3 v Potters Bar TownPotters Bar Town 3-0 East Thurrock United | Isthmian League - Premier Division |
| 12 | Sat 16 Oct 2021 | 31-4 v Carshalton AthleticCarshalton Athletic 4-1 East Thurrock United | Isthmian League - Premier Division |
| 13 | Tue 19 Oct 2021 | 31-2 v Bishop's StortfordEast Thurrock United 1-2 Bishop's Stortford | Isthmian League - Premier Division |
| 14 | Sat 23 Oct 2021 | 30-8 v Enfield TownEast Thurrock United 0-8 Enfield Town | Isthmian League - Premier Division |
| 15 | Sat 30 Oct 2021 | 30-6 v KingstonianEast Thurrock United 0-6 Kingstonian | Buildbase FA Trophy Third Qualifying Round |
| 16 | Sat 6 Nov 2021 | 3 0-2 v LeatherheadEast Thurrock United 0-2 Leatherhead | Isthmian League - Premier Division |
| 17 | Tue 9 Nov 2021 | 3 2-0 v LewesEast Thurrock United 2-0 Lewes | Isthmian League - Premier Division |
| 18 | Sat 20 Nov 2021 | 3 1-1 v Corinthian-CasualsEast Thurrock United 1-1 Corinthian-Casuals | Isthmian League - Premier Division |
| 19 | Tue 7 Dec 2021 | 32-1 v Brightlingsea RegentBrightlingsea Regent 1-2 East Thurrock United | Essex County Cup Third Round |
| 20 | Sat 11 Dec 2021 | 31-3 v HorshamHorsham 3-1 East Thurrock United | Isthmian League - Premier Division |
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