| 1 | Thu 22 Aug | 31 2-1 v HäckenHäcken 1-2 1 FC Heidenheim | UEFA Europa Conference League Play-off |
| 2 | Sun 25 Aug | 312-0 v FC St PauliFC St Pauli 0-2 1 FC Heidenheim | German Bundesliga |
| 3 | Thu 29 Aug | 313-2 v Häcken1 FC Heidenheim 3-2 Häcken | UEFA Europa Conference League Play-off |
| 4 | Sun 1 Sep | 314-0 v FC Augsburg1 FC Heidenheim 4-0 FC Augsburg | German Bundesliga |
| 5 | Sat 21 Sep | 310-3 v SC Freiburg1 FC Heidenheim 0-3 SC Freiburg | German Bundesliga |
| 6 | Thu 3 Oct | 312-1 v Olimpija Ljubljana1 FC Heidenheim 2-1 Olimpija Ljubljana | UEFA Europa Conference League Matchday 1 |
| 7 | Sun 6 Oct | 310-1 v RB Leipzig1 FC Heidenheim 0-1 RB Leipzig | German Bundesliga |
| 8 | Sat 19 Oct | 312-3 v Borussia MönchengladbachBorussia Mönchengladbach 3-2 1 FC Heidenheim | German Bundesliga |
| 9 | Thu 24 Oct | 311-0 v PafosPafos 0-1 1 FC Heidenheim | UEFA Europa Conference League Matchday 2 |
| 10 | Sun 27 Oct | 310-0 v 1899 Hoffenheim1 FC Heidenheim 0-0 1899 Hoffenheim | German Bundesliga |
| 11 | Sat 2 Nov | 310-1 v Holstein KielHolstein Kiel 1-0 1 FC Heidenheim | German Bundesliga |
| 12 | Thu 7 Nov | 312-0 v Heart of MidlothianHeart of Midlothian 0-2 1 FC Heidenheim | UEFA Europa Conference League Matchday 3 |
| 13 | Sun 10 Nov | 311-3 v VfL Wolfsburg1 FC Heidenheim 1-3 VfL Wolfsburg | German Bundesliga |
| 14 | Sat 23 Nov | 312-5 v Bayer 04 LeverkusenBayer 04 Leverkusen 5-2 1 FC Heidenheim | German Bundesliga |
| 15 | Thu 28 Nov | 310-2 v Chelsea1 FC Heidenheim 0-2 Chelsea | UEFA Europa Conference League Matchday 4 |
| 16 | Sun 1 Dec | 310-4 v Eintracht Frankfurt1 FC Heidenheim 0-4 Eintracht Frankfurt | German Bundesliga |
| 17 | Sat 7 Dec | 312-4 v Bayern MunichBayern Munich 4-2 1 FC Heidenheim | German Bundesliga |
| 18 | Sun 15 Dec | 311-3 v VfB Stuttgart1 FC Heidenheim 1-3 VfB Stuttgart | German Bundesliga |
| 19 | Thu 19 Dec | 311-1 v St Gallen1 FC Heidenheim 1-1 St Gallen | UEFA Europa Conference League Matchday 6 |
| 20 | Sun 22 Dec | 31 0-2 v VfL BochumVfL Bochum 2-0 1 FC Heidenheim | German Bundesliga |
| 21 | Sat 11 Jan | 312-0 v 1 FC Union Berlin1 FC Heidenheim 2-0 1 FC Union Berlin | German Bundesliga |
| 22 | Wed 15 Jan | 313-3 v Werder BremenWerder Bremen 3-3 1 FC Heidenheim | German Bundesliga |
| 23 | Sat 18 Jan | 310-2 v FC St Pauli1 FC Heidenheim 0-2 FC St Pauli | German Bundesliga |
| 24 | Sat 25 Jan | 311-2 v FC AugsburgFC Augsburg 2-1 1 FC Heidenheim | German Bundesliga |
| 25 | Sat 1 Feb | 311-2 v Borussia Dortmund1 FC Heidenheim 1-2 Borussia Dortmund | German Bundesliga |
| 26 | Sat 8 Feb | 310-1 v SC FreiburgSC Freiburg 1-0 1 FC Heidenheim | German Bundesliga |
| 27 | Thu 13 Feb | 312-1 v FC CopenhagenFC Copenhagen 1-2 1 FC Heidenheim | UEFA Europa Conference League Knockout Round |
| 28 | Sun 23 Feb | 312-2 v RB LeipzigRB Leipzig 2-2 1 FC Heidenheim | German Bundesliga |
| 29 | Sat 1 Mar | 310-3 v Borussia Mönchengladbach1 FC Heidenheim 0-3 Borussia Mönchengladbach | German Bundesliga |
| 30 | Sun 9 Mar | 311-1 v 1899 Hoffenheim1899 Hoffenheim 1-1 1 FC Heidenheim | German Bundesliga |
| 31 | Sun 16 Mar | 313-1 v Holstein Kiel1 FC Heidenheim 3-1 Holstein Kiel | German Bundesliga |
| 32 | Sat 5 Apr | 310-1 v Bayer 04 Leverkusen1 FC Heidenheim 0-1 Bayer 04 Leverkusen | German Bundesliga |
| 33 | Sun 13 Apr | 310-3 v Eintracht FrankfurtEintracht Frankfurt 3-0 1 FC Heidenheim | German Bundesliga |
| 34 | Sat 19 Apr | 310-4 v Bayern Munich1 FC Heidenheim 0-4 Bayern Munich | German Bundesliga |
| 35 | Fri 25 Apr | 31 1-0 v VfB StuttgartVfB Stuttgart 0-1 1 FC Heidenheim | German Bundesliga |
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