2018 Class 4A Football Postseason
Updated: October 20, 2018
2018 IHSAA Postseason Football
Class 4A Brackets
Semifinals: Friday, November 9
Championship: Friday, November 16
First Round: Friday, October 26
Quarterfinals: Friday, November 2
Class 4A Qualifiers
Teams winning or sharing district championships listed in bold
| # | School | Record | RPI |
| 1. | Ankeny Centennial | 9-0 | .6955 |
| 2. | Valley, W.D.M. | 9-0 | .6910 |
| 3. | Cedar Falls | 9-0 | .6830 |
| 4. | Iowa City, West | 8-1 | .6696 |
| 5. | Bettendorf | 8-1 | .6627 |
| 6. | Waukee | 7-2 | .6423 |
| 7. | Dowling Catholic | 7-2 | .6420 |
| 8. | Johnston | 7-2 | .6217 |
| 9. | Prairie, Cedar Rapids | 7-2 | .6151 |
| 10. | Fort Dodge | 7-2 | .6015 |
| 11. | Pleasant Valley | 5-4 | .5708 |
| 12. | Urbandale | 6-3 | .5660 |
| 13. | Cedar Rapids, Kennedy | 6-3 | .5598 |
| 14. | Indianola | 6-3 | .5578 |
| 15. | Ankeny | 5-4 | .5477 |
| 16. | Southeast Polk | 4-5 | .5398 |