| 2021-05-09 | DoncastervPeterboroLeague One · England | 1–4 | League One · England |
| 2021-05-01 | PeterborovLincolnLeague One · England | 3–3 | League One · England |
| 2021-04-27 | PeterborovDoncasterLeague One · England | 2–2 | League One · England |
| 2021-04-24 | CharltonvPeterboroLeague One · England | 0–1 | League One · England |
| 2021-04-20 | PeterborovGillinghamLeague One · England | 0–1 | League One · England |
| 2021-04-16 | PeterborovNorthamptonLeague One · England | 3–1 | League One · England |
| 2021-04-10 | SwindonvPeterboroLeague One · England | 0–3 | League One · England |
| 2021-04-05 | PeterborovSunderlandLeague One · England | 1–1 | League One · England |
| 2021-04-02 | Fleetwood TownvPeterboroLeague One · England | 0–1 | League One · England |
| 2021-03-27 | PeterborovAccringtonLeague One · England | 7–0 | League One · England |
| 2021-03-23 | BlackpoolvPeterboroLeague One · England | 3–1 | League One · England |
| 2021-03-20 | RochdalevPeterboroLeague One · England | 3–3 | League One · England |
| 2021-03-16 | PeterborovPortsmouthLeague One · England | 1–0 | League One · England |
| 2021-03-09 | PeterborovHullLeague One · England | 1–3 | League One · England |
| 2021-03-06 | BurtonvPeterboroLeague One · England | 2–1 | League One · England |
| 2021-03-02 | OxfordvPeterboroLeague One · England | 0–0 | League One · England |
| 2021-02-27 | PeterborovWiganLeague One · England | 2–1 | League One · England |
| 2021-02-23 | PlymouthvPeterboroLeague One · England | 0–3 | League One · England |
| 2021-02-20 | PeterborovAFC WimbledonLeague One · England | 3–0 | League One · England |
| 2021-02-16 | GillinghamvPeterboroLeague One · England | 1–3 | League One · England |
| 2021-02-09 | PeterborovIpswichLeague One · England | 2–1 | League One · England |
| 2021-02-06 | PeterborovCreweLeague One · England | 2–0 | League One · England |
| 2021-01-30 | ShrewsburyvPeterboroLeague One · England | 2–0 | League One · England |
| 2021-01-26 | PeterborovBristol RvsLeague One · England | 0–0 | League One · England |
| 2021-01-23 | IpswichvPeterboroLeague One · England | 0–1 | League One · England |
| 2021-01-19 | PeterborovCharltonLeague One · England | 2–1 | League One · England |
| 2021-01-16 | PeterborovMilton Keynes DonsLeague One · England | 3–0 | League One · England |
| 2021-01-09 | LincolnvPeterboroLeague One · England | 1–1 | League One · England |