| 1 | 10/7/2021 | 10-5 v Tonbridge AngelsTonbridge Angels 5-0 Grays Athletic | Friendly |
| 2 | 24/7/2021 | 12-1 v TilburyTilbury 1-2 Grays Athletic | Friendly |
| 3 | 27/7/2021 | 11-2 v WareWare 2-1 Grays Athletic | Friendly |
| 4 | 31/7/2021 | 11-1 v Braintree TownGrays Athletic 1-1 Braintree Town | Friendly |
| 5 | 4/8/2021 | 11-4 v HornchurchGrays Athletic 1-4 Hornchurch | Friendly |
| 6 | 7/8/2021 | 10-3 v Enfield TownEnfield Town 3-0 Grays Athletic | Friendly |
| 7 | 14/8/2021 | 12-1 v Bury TownGrays Athletic 2-1 Bury Town | Isthmian League - North Division |
| 8 | 22/8/2021 | 11-2 v Baldock TownBaldock Town 2-1 Grays Athletic | Emirates FA Cup Preliminary Round |
| 9 | 28/8/2021 | 17-0 v Basildon UnitedBasildon United 0-7 Grays Athletic | Isthmian League - North Division |
| 10 | 30/8/2021 | 12-1 v AveleyGrays Athletic 2-1 Aveley | Isthmian League - North Division |
| 11 | 10/9/2021 | 11-2 v Maldon & TiptreeMaldon & Tiptree 2-1 Grays Athletic | Isthmian League - North Division |
| 12 | 15/9/2021 | 14-0 v RomfordGrays Athletic 4-0 Romford | Isthmian League - North Division |
| 13 | 18/9/2021 | 11-1 v Coggeshall TownCoggeshall Town 1-1 Grays Athletic | Isthmian League - North Division |
| 14 | 2/10/2021 | 13-0 v Felixstowe & Walton UnitedGrays Athletic 3-0 Felixstowe & Walton United | Isthmian League - North Division |
| 15 | 16/10/2021 | 11-0 v FisherGrays Athletic 1-0 Fisher | Friendly |
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