| Sat 14 Aug | 15:00 | SBF-S | Tunbridge Wells U23 vs. Erith Town U23s | 2 - 4 | Match Centre |
| Sat 21 Aug | 15:00 | SBF-S | Erith Town U23s vs. Merstham FC U23 | 2 - 2 | Match Centre |
| Sat 28 Aug | 15:00 | SBF-S | Erith Town U23s vs. Knaphill U23 | 4 - 0 | Match Centre |
| Mon 30 Aug | 19:00 | FA Youth Cup 2021-22 | Chatham Town FC Reserves vs. Erith Town U23s | 1 - 2 | Match Centre |
| Sat 04 Sep | 15:00 | SBF-S | Erith Town U23s vs. Holmesdale Reserves | 3 - 3 | Match Centre |
| Sat 18 Sep | 15:00 | SBF-S | Leatherhead FC U23 vs. Erith Town U23s | 1 - 0 | Match Centre |
| Tue 21 Sep | 15:00 | SBF-S | Sheppey United U23 vs. Erith Town U23s | 1 - 5 | Match Centre |
| Sat 02 Oct | 15:00 | SBF-S | Erith Town U23s vs. Sheerwater Reserves | 3 - 1 | Match Centre |
| Sat 09 Oct | 15:00 | SBF-S | Horley Town U23 vs. Erith Town U23s | 2 - 1 | Match Centre |
| Sat 16 Oct | 15:00 | LDNFA | Erith Town U23s vs. Ten Em Bee | 5 - 1 | Match Centre |
| Sat 23 Oct | 15:00 | SBF-S | Erith Town U23s vs. Glebe Reserves | 0 - 0 | Match Centre |
| Sat 06 Nov | 15:00 | MBC | Erith Town U23s vs. Chalfont St Peter FC U23 | 3 - 0 | Match Centre |
| Sat 20 Nov | 15:00 | LDNFA | Erith Town U23s vs. Hilltop FC Reserves | 0 - 4 | Match Centre |
| Sat 27 Nov | 15:00 | SBF-S | Sheerwater Reserves vs. Erith Town U23s | 3 - 6 | Match Centre |
| Wed 01 Dec | 15:00 | MBC | Jersey Bulls FC U23 vs. Erith Town U23s | 4 - 1 | Match Centre |
| Sat 04 Dec | 15:00 | SBF-S | Erith Town U23s vs. Tunbridge Wells U23 | 1 - 2 | Match Centre |
| Sat 15 Jan | 15:00 | SBF-S | Erith Town U23s vs. Sheppey United U23 | 6 - 1 | Match Centre |
| Sat 22 Jan | 15:00 | SBF-S | Chatham Town FC Reserves vs. Erith Town U23s | 3 - 6 | Match Centre |
| Sat 05 Feb | 15:00 | Suburban Football League Cup 2021/22 | Chatham Town FC Reserves vs. Erith Town U23s | 0 - 8 | Match Centre |
| Sat 12 Feb | 15:00 | Suburban Football League Cup 2021/22 | Erith Town U23s vs. Holmesdale Reserves | 4 - 1 | Match Centre |
| Wed 23 Feb | 15:00 | Suburban Football League Challenge Shield | Corinthian vs. Erith Town U23s | 0 - 8 | Match Centre |
| Mon 07 Mar | 19:45 | Suburban Football League Challenge Shield | Sheppey United U23 vs. Erith Town U23s | 1 - 2 | Match Centre |
| Sat 12 Mar | 15:00 | SBF-S | Erith Town U23s vs. Horley Town U23 | 2 - 0 | Match Centre |
| Sat 19 Mar | 15:00 | SBF-S | Glebe Reserves vs. Erith Town U23s | 3 - 3 | Match Centre |
| Sat 02 Apr | 15:00 | SBF-S | Erith Town U23s vs. Leatherhead FC U23 | 2 - 1 | Match Centre |
| Wed 06 Apr | 19:45 | SBF-S | Merstham FC U23 vs. Erith Town U23s | 3 - 1 | Match Centre |
| Mon 11 Apr | 19:30 | SBF-S | Erith Town U23s vs. Tunbridge Wells U23 | 4 - 1 | Match Centre |
| Wed 13 Apr | 19:30 | SBF-S | Erith Town U23s vs. Sheppey United U23 | 4 - 1 | Match Centre |
| Sat 16 Apr | 15:00 | SBF-S | Erith Town U23s vs. Chatham Town FC Reserves | 4 - 2 | Match Centre |
| Wed 11 May | 19:45 | Suburban Football League Challenge Shield | Erith Town U23s vs. Slough Town FC | 0 - 6 | Match Centre |