| 8/31/2018 | Western State (2-9) | 10 | at | Idaho State | 45 | RMAC (D2) | ||
| 9/15/2018 | Idaho State | 23 | at | California (7-6) | 45 | at P12 | ||
| 9/22/2018 | Idaho State | 25 | at | North Dakota (6-5) | 21 | at Ind1AA | ||
| 9/29/2018 | Northern Arizona (4-6,2-5) | 42 | at | Idaho State | 56 | |||
| 10/6/2018 | Idaho (4-7,2-5) | 28 | at | Idaho State | 62 | |||
| 10/13/2018 | Idaho State | 37 | at | UC Davis (10-3,7-2) | 44 | OT | ||
| 10/20/2018 | Idaho State | 41 | at | Liberty (6-6) | 48 | at Ind | ||
| 10/27/2018 | Montana State (8-5,5-3) | 17 | at | Idaho State | 24 | |||
| 11/3/2018 | Idaho State | 48 | at | Portland State (4-7,3-4) | 45 | |||
| 11/10/2018 | Idaho State | 14 | at | Cal Poly (5-6,4-5) | 37 | |||
| 11/17/2018 | Weber State (10-3,7-1) | 26 | at | Idaho State | 13 |
| vs Idaho State | vs Other Opponents | Idaho State compared to OOs | |
| Record: | 5-6 | 61-57 | |
| Points Scored: | 33.00 | 27.49 | -5.51 |
| Points Allowed: | 35.27 | 29.25 | 6.02 |
| Margin: | -2.27 | -1.76 | 0.51 |
| Total Points: | 68.27 | 56.74 | 11.53 |