| Matches: Year By Year |
| Celtic Games Played:- | 2021 |
| Other Match Pages:- | 2020 | 2022 |
| Decade of Matches:- | 2021-2030 |
| Picture Pages:- | 2020-21 | 2021-22 |
| League Tables:- | 2020-21 | 2021-22 |
| Date | Competition | Home Team | Score | Score | Away Team | Report | Pictures | Notes |
| JAN | ||||||||
| 02 | Scottish Premiership | TheRangers | 1 | 0 | Celtic | Report | Pictures | KO: |
| 11 | Scottish Premiership | Celtic | 1 | 1 | Hibernian | Report | Pictures | KO: |
| 16 | Scottish Premiership | Celtic | 0 | 0 | Livingston | Report | Pictures | KO: |
| 20 | Scottish Premiership | Livingston | 2 | 2 | Celtic | Report | Pictures | KO: |
| 27 | Scottish Premiership | Celtic | 2 | 0 | Hamilton Academical | Report | Pictures | KO: |
| 30 | Scottish Premiership | Celtic | 1 | 2 | St Mirren | Report | Pictures | KO: |
| FEB | ||||||||
| 02 | Scottish Premiership | Kilmarnock | 0 | 4 | Celtic | Report | Pictures | KO: |
| 06 | Scottish Premiership | Celtic | 2 | 1 | Motherwell | Report | Pictures | KO: |
| 10 | Scottish Premiership | St Mirren | 0 | 4 | Celtic | Report | Pictures | KO: |
| 14 | Scottish Premiership | St Johnstone | 1 | 2 | Celtic | Report | Pictures | KO: |
| 17 | Scottish Premiership | Celtic | 1 | 0 | Aberdeen | Report | Pictures | KO: |
| 21 | Scottish Premiership | Ross County | 1 | 0 | Celtic | Report | Pictures | KO: Neil Lennon ‘s last match in charge, resigned/cut few days after |
| 27 | Scottish Premiership | Celtic | 1 | 0 | Aberdeen | Report | Pictures | KO: John Kennedy takes over as interim manager |
| MAR | ||||||||
| 07 | Scottish Premiership | Dundee Utd | 0 | 0 | Celtic | Report | Pictures | KO: |
| 21 | Scottish Premiership | Celtic | 1 | 1 | The Rangers | Report | Pictures | KO: |
| APR | ||||||||
| 03 | Scottish Cup | Celtic | 3 | 0 | Falkirk | Report | Pictures | KO: |
| 10 | Scottish Premiership | Celtic | 6 | 0 | Livingston | Report | Pictures | KO: |
| 18 | Scottish Cup | TheRangers | 2 | 0 | Celtic | Report | Pictures | KO: |
| 21 | Scottish Premiership | Aberdeen | 1 | 1 | Celtic | Report | Pictures | KO: |
| MAY | ||||||||
| 02 | Scottish Premiership | TheRangers | 4 | 1 | Celtic | Report | Pictures | KO: |
| 12 | Scottish Premiership | Celtic | 4 | 0 | St Johnstone | Report | Pictures | KO: |
| 15 | Scottish Premiership | Hibernian | 0 | 0 | Celtic | Report | Pictures | KO: |
- Season Review
- Champions League 2020-2021
- UEFA Cup/Europa League 2020-2021
- Statistics 2020-2021
- League Table 2020-2021
- KDS Player of the Year 2020-2021
- Scottish Cup 2020-2021
- League Cup 2020-2021
- Team Line-Up Pictures 2021-2022
| Date | Competition | Home Team | Score | Score | Away Team | Report | Pictures | Notes |
| JUL | ||||||||
| 7 |
Friendly | Celtic | 3 | 1 | Sheffield Wednesday | Report | Pictures |
KO: 15:00 first match for new mgr Ange Postecoglu |
| 10 |
Friendly | Celtic | 2 | 1 | Charlton Athletic | Report | Pictures | KO:15:00 |
| 14 |
Friendly | Celtic | 0 | 0 | Bristol City | Report | Pictures | KO: 19.45 |
| 17 |
Friendly | Celtic | 0 | 1 | Preston North End | Report | Pictures | KO: 17:30 |
| 20 |
European Cup | Celtic | 1 | 1 | FC MidtjyllandUtd | Report | Pictures |
KO:19:45 1st leg, 2nd rnd first competitive match for Ange Postecoglu |
| 24 |
Friendly | Celtic | 2 | 6 | West Ham | Report | Pictures | KO: 15:00 |
| 28 |
European Cup | FC MidtjyllandUtd | 2 | 1 | Celtic | Report | Pictures |
KO: 18:45 2nd Leg, 2nd rnd (out of Champions Lge) |
| 31 |
Scottish Premiership | Hearts | 2 | 1 | Celtic | Report | Pictures | KO: 20:00 |
| AUG | ||||||||
| 5 | UEFA Cup | FK Jablonec | 2 | 4 | Celtic | Report | Pictures | KO: 16:45 |
| 8 | Scottish Premiership | Celtic | 6 | 0 | Dundee | Report | Pictures | KO: 15:00 |
| 12 | UEFA Cup | Celtic | 3 | 0 | FK Jablonec | Report | Pictures |
KO: 19:45 (second leg) |
| 15 | League Cup | Celtic | 3 | 2 | Hearts | Report | Pictures | KO: 15:00; round of 16 |
| 19 | UEFA Cup | Celtic | 2 | 0 | AZ Alkmaar | Report | Pictures |
KO: 19:45 (Play-offs 1st leg) |
| 21 | Scottish Premiership | Celtic | 6 | 0 | St Mirren | Report | Pictures | KO: 5:00 |
| 26 | UEFA Cup | AZ Alkmaar | 2 | 1 | Celtic | Report | Pictures |
KO: (Play-offs 2nd leg) |
| 29 | Scottish Premiership | TheRangers | 1 | 0 | Celtic | Report | Pictures | KO: 12:00 |
| SEP | ||||||||
| 11 | Scottish Premiership | Celtic | 3 | 0 | Ross County | Report | Pictures | KO: 15:00; Celtic CEO resigns |
| 16 | UEFA Cup | Real Betis | 4 | 3 | Celtic | Report | Pictures | KO: 17:45, Match 1 |
| 19 | Scottish Premiership | Livingston | 1 | 0 | Celtic | Report | Pictures | KO: 15:00 |
| 23 | Scottish League Cup | Celtic | 3 | 0 | Raith Rovers | Report | Pictures | KO: 19:45 |
| 26 | Scottish Premiership | Celtic | 1 | 1 | Dundee Utd | Report | Pictures | KO: 15:00 |
| 30 | UEFA Cup | Celtic | 0 | 4 | Bayer Leverkusen | Report | Pictures | KO: 20:00 Match 2 |
| OCT | ||||||||
| 3 | Scottish Premiership | Aberdeen | 1 | 2 | Celtic | Report | Pictures | KO: 12:00 |
| 16 | Scottish Premiership | Motherwell | 0 | 2 | Celtic | Report | Pictures | KO: 15:00 |
| 19 | UEFA Cup | Celtic | 2 | 0 | Ferencvaros | Report | Pictures | KO: 15:30 Match 3 |
| 23 | Scottish Premiership | Celtic | 2 | 0 | St Johnstone | Report | Pictures | KO: 15:00 |
| 27 | Scottish Premiership | Hibernian | 1 | 3 | Celtic | Report | Pictures | KO: 19:45 |
| 30 | Scottish Premiership | Celtic | 0 | 0 | Livingstone | Report | Pictures | KO: 15:00 |
| NOV | ||||||||
| 4 | UEFA Cup | Ferencvaros | 2 | 3 | Celtic | Report | Pictures | KO: 20:00; Match 4 |
| 7 | Scottish Premiership | Dundee | 2 | 4 | Celtic | Report | Pictures | KO: 12:00 |
| 20 | Scottish League Cup | St Johnstone | 0 | 1 | Celtic | Report | Pictures | KO: 17:15; Semi-final |
| 25 | UEFA Cup | Bayer Leverkusen | 3 | 2 | Celtic | Report | Pictures | KO: 17:45; Match 5 |
| 28 | Scottish Premiership | Celtic | 2 | 1 | Aberdeen | Report | Pictures | KO: 15:00 |
| DEC | ||||||||
| 2 | Scottish Premiership | Celtic | 1 | 0 | Hearts | Report | Pictures | KO: 19:00 |
| 5 | Scottish Premiership | Dundee Utd | 0 | 3 | Celtic | Report | Pictures | KO: 12:00 |
| 9 | UEFA Cup | Celtic | 3 | 2 | Real Betis | Report | Pictures | KO: 20:00, Match 6 |
| 12 | Scottish Premiership | Celtic | 1 | 0 | Motherwell | Report | Pictures | KO: 15:00 |
| 15 | Scottish Premiership | Ross County | 1 | 2 | Celtic | Report | Pictures | KO: 19:45 |
| 19 | League Cup | Hibernian | 1 | 2 | Celtic | Report | Pictures | KO: 15:00; Final; Celtic win the League Cup |
| 22 | Scottish Premiership | St Mirren | 0 | 0 | Celtic | Report | Pictures | KO: 19:45 |
| 26 | Scottish Premiership | St Johnstone | 1 | 3 | Celtic | Report | Pictures | KO: 12:30 |
| 29 | Scottish Premiership | Celtic | p | p | Hibernian | Report | Pictures | KO: 19:45 |