Key: Win : Draw : Loss
| Date | Home | Away | Ref | ||
|---|---|---|---|---|---|
| 04/08/2018 | Oldham | 1 | 2 | Milton Keynes Dons | N Hair |
| 11/08/2018 | Forest Green | 1 | 1 | Oldham | D Drysdale |
| 18/08/2018 | Oldham | 3 | 1 | Macclesfield | A Haines |
| 21/08/2018 | Yeovil | 0 | 0 | Oldham | J Busby |
| 25/08/2018 | Morecambe | 0 | 2 | Oldham | M Coy |
| 01/09/2018 | Oldham | 2 | 1 | Crawley Town | M Salisbury |
| 08/09/2018 | Oldham | 0 | 1 | Newport County | M Heywood |
| 15/09/2018 | Grimsby | 0 | 3 | Oldham | N Kinseley |
| 22/09/2018 | Oldham | 3 | 3 | Colchester | A Backhouse |
| 29/09/2018 | Swindon | 0 | 0 | Oldham | C Hicks |
| 02/10/2018 | Mansfield | 0 | 0 | Oldham | T Bramall |
| 06/10/2018 | Oldham | 1 | 3 | Carlisle | D Whitestone |
| 20/10/2018 | Oldham | 0 | 1 | Port Vale | P Wright |
| 23/10/2018 | Oldham | 2 | 0 | Cheltenham | B Toner |
| 27/10/2018 | Northampton | 2 | 1 | Oldham | C Breakspear |
| 03/11/2018 | Stevenage | 3 | 2 | Oldham | G Scott |
| 06/11/2018 | Notts County | 0 | 0 | Oldham | O Yates |
| 17/11/2018 | Oldham | 3 | 1 | Cambridge | A Backhouse |
| 24/11/2018 | Tranmere | 1 | 1 | Oldham | S Stockbridge |
| 27/11/2018 | Oldham | 1 | 1 | Lincoln | B Toner |
| 08/12/2018 | Crewe | 0 | 2 | Oldham | B Huxtable |
| 15/12/2018 | Oldham | 4 | 2 | Bury | D England |
| 22/12/2018 | Oldham | 2 | 3 | Exeter | M Coy |
| 26/12/2018 | Carlisle | 6 | 0 | Oldham | A Haines |
| 29/12/2018 | Port Vale | 1 | 4 | Oldham | P Marsden |
| 01/01/2019 | Oldham | 2 | 0 | Notts County | A Backhouse |
| 12/01/2019 | Oldham | 0 | 0 | Forest Green | D Whitestone |
| 19/01/2019 | Macclesfield | 2 | 1 | Oldham | O Yates |
| 29/01/2019 | Milton Keynes Dons | 2 | 1 | Oldham | A Coggins |
| 09/02/2019 | Crawley Town | 0 | 3 | Oldham | J Busby |
| 12/02/2019 | Oldham | 4 | 1 | Yeovil | T Bramall |
| 16/02/2019 | Oldham | 1 | 1 | Crewe | G Salisbury |
| 19/02/2019 | Oldham | 1 | 2 | Morecambe | A Haines |
| 23/02/2019 | Bury | 3 | 1 | Oldham | D Drysdale |
| 02/03/2019 | Oldham | 1 | 1 | Stevenage | C Sarginson |
| 09/03/2019 | Cambridge | 1 | 1 | Oldham | K Johnson |
| 12/03/2019 | Lincoln | 2 | 0 | Oldham | P Collins |
| 30/03/2019 | Oldham | 2 | 0 | Grimsby | J Adcock |
| 02/04/2019 | Oldham | 2 | 0 | Tranmere | M Donohue |
| 06/04/2019 | Colchester | 0 | 2 | Oldham | L Swabey |
| 13/04/2019 | Oldham | 2 | 2 | Swindon | M Coy |
| 19/04/2019 | Cheltenham | 0 | 0 | Oldham | B Toner |
| 22/04/2019 | Oldham | 3 | 2 | Mansfield | J Busby |
| 27/04/2019 | Exeter | 1 | 0 | Oldham | C Sarginson |
| 30/04/2019 | Newport County | 2 | 0 | Oldham | C Hicks |
| 04/05/2019 | Oldham | 2 | 5 | Northampton | T Bramall |