| 1 | Sat 10 Jul 2021 | 70-5 v Tonbridge AngelsTonbridge Angels 5-0 Grays Athletic | Friendly |
| 2 | Wed 14 Jul 2021 | 73-3 v Phoenix SportsGrays Athletic 3-3 Phoenix Sports | Friendly |
| 3 | Sat 17 Jul 2021 | 111-2 v KingstonianGrays Athletic 1-2 Kingstonian | Friendly |
| 4 | Sat 24 Jul 2021 | 72-1 v TilburyTilbury 1-2 Grays Athletic | Friendly |
| 5 | Tue 27 Jul 2021 | 181-2 v WareWare 2-1 Grays Athletic | Friendly |
| 6 | Sat 31 Jul 2021 | 71-1 v Braintree TownGrays Athletic 1-1 Braintree Town | Friendly |
| 7 | Wed 4 Aug 2021 | 71-4 v HornchurchGrays Athletic 1-4 Hornchurch | Friendly |
| 8 | Sat 14 Aug 2021 | 72-1 v Bury TownGrays Athletic 2-1 Bury Town | Isthmian League - North Division |
| 9 | Sun 22 Aug 2021 | 21-2 v Baldock TownBaldock Town 2-1 Grays Athletic | Emirates FA Cup Preliminary Round |
| 10 | Sat 28 Aug 2021 | 77-0 v Basildon UnitedBasildon United 0-7 Grays Athletic | Isthmian League - North Division |
| 11 | Mon 30 Aug 2021 | 72-1 v AveleyGrays Athletic 2-1 Aveley | Isthmian League - North Division |
| 12 | Wed 15 Sep 2021 | 114-0 v RomfordGrays Athletic 4-0 Romford | Isthmian League - North Division |
| 13 | Sat 18 Sep 2021 | 11 1-1 v Coggeshall TownCoggeshall Town 1-1 Grays Athletic | Isthmian League - North Division |
| 14 | Sat 25 Sep 2021 | 71-1 v CorinthianCorinthian 1-1 Grays Athletic | Buildbase FA Trophy First Qualifying Round |
| 15 | Sat 2 Oct 2021 | 123-0 v Felixstowe & Walton UnitedGrays Athletic 3-0 Felixstowe & Walton United | Isthmian League - North Division |
| 16 | Sat 16 Oct 2021 | 121-0 v FisherGrays Athletic 1-0 Fisher | Friendly |
| 17 | Sat 23 Oct 2021 | 73-1 v Heybridge SwiftsHeybridge Swifts 1-3 Grays Athletic | Isthmian League - North Division |
| 18 | Tue 2 Nov 2021 | 110-1 v Great Wakering RoversGreat Wakering Rovers 1-0 Grays Athletic | Isthmian League - North Division |
| 19 | Wed 10 Nov 2021 | 111-1 v AFC SudburyGrays Athletic 1-1 AFC Sudbury | Isthmian League - North Division |
| 20 | Sat 13 Nov 2021 | 110-2 v Stowmarket TownGrays Athletic 0-2 Stowmarket Town | Isthmian League - North Division |
| 21 | Tue 16 Nov 2021 | 112-1 v Billericay TownGrays Athletic 2-1 Billericay Town | Friendly |
| 22 | Sat 20 Nov 2021 | 141-1 v Witham TownWitham Town 1-1 Grays Athletic | Isthmian League - North Division |
| 23 | Sat 27 Nov 2021 | 141-0 v Hashtag UnitedHashtag United 0-1 Grays Athletic | Isthmian League - North Division |
| 24 | Wed 1 Dec 2021 | 110-0 v BarkingGrays Athletic 0-0 Barking | Velocity Trophy Second Round |
| 25 | Sat 4 Dec 2021 | 122-2 v TilburyGrays Athletic 2-2 Tilbury | Isthmian League - North Division |
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