Final OAF ranking (& ratings) for the 1998 college football season:
| Rank | Team Name | Rating | Record | AP | ESPN/USA Today | Bowl Game Results |
| 1 | TENNESSEE | 115.8557 | 13-0 | 1 | 1 | Beat Florida State 23-16 |
| 2 | FLORIDA STATE | 106.3011 | 11-2 | 3 | 3 | Lost to Tennessee |
| 3 | FLORIDA | 100.1891 | 10-2 | 5 | 6 | Beat Syracuse 31-10 |
| 4 | OHIO STATE | 96.6752 | 11-1 | 2 | 2 | Beat Texas A+M 24-14 |
| 5 | ARIZONA | 95.4617 | 12-1 | 4 | 4 | Beat Nebraska 23-20 |
| 6 | TEXAS A+M | 93.7608 | 11-3 | 11 | 13 | Lost to Ohio State |
| 7 | TEXAS | 91.5862 | 9-3 | 15 | 16 | Beat Mississippi State 38-11 |
| 8 | NEBRASKA | 90.0113 | 9-4 | 19 | 20 | Lost to Arizona |
| 9 | WISCONSIN | 88.0682 | 11-1 | 6 | 5 | Beat UCLA 38-31 |
| 10 | PURDUE | 87.7085 | 9-4 | 24 | 23 | Beat Kansas State 37-34 |
| 11 | MISSOURI | 87.5520 | 8-4 | 21 | 25 | Beat West Virginia 34-31 |
| 12 | UCLA | 87.0786 | 10-2 | 8 | 8 | Lost to Wisconsin |
| 13 | KANSAS STATE | 86.9942 | 11-2 | 10 | 9 | Lost to Purdue |
| 14 | MICHIGAN | 86.2109 | 10-3 | 12 | 12 | Beat Arkansas 45-31 |
| 15 | PENN STATE | 85.0739 | 9-3 | 17 | 15 | Beat Kentucky 26-14 |
| 16 | MIAMI (F) | 82.8432 | 9-3 | 20 | 21 | Beat North Carolina State 46-23 |
| 17 | AIR FORCE | 81.1010 | 12-1 | 13 | 10 | Beat Washington 45-25 |
| 18 | MICHIGAN STATE | 80.3683 | 6-6 | NR | NR | No Bowl Game |
| 19 | GEORGIA TECH | 80.0205 | 10-2 | 9 | 11 | Beat Notre Dame 35-28 |
| 20 | NOTRE DAME | 79.3062 | 9-3 | 22 | 22 | Lost to Georgia Tech |
| 21 | USC | 78.3294 | 8-5 | NR | NR | Lost to TCU |
| 22 | GEORGIA | 78.1820 | 9-3 | 14 | 14 | Beat Virginia 35-33 |
| 23 | ARKANSAS | 77.6367 | 9-3 | 16 | 17 | Lost to Michigan |
| 24 | VIRGINIA | 77.4677 | 9-3 | 18 | 18 | Lost to Georgia |
| 25 | TULANE | 76.0859 | 12-0 | 7 | 7 | Beat BYU 41-27 |
| 26 | COLORADO | 75.8617 | 8-4 | 26 | 28 | Beat Oregon 50-43 |
| 27 | OREGON | 75.1474 | 8-4 | 28 | 29 | Lost to Colorado |
| 28 | MISSISSIPPI STATE | 74.4899 | 7-5 | 29 | 26 | Lost to Texas |
| 29 | SYRACUSE | 74.4477 | 8-4 | 25 | 24 | Lost to Florida |
| 30 | OREGON STATE | 73.6377 | ||||
| 31 | VIRGINIA TECH | 73.1449 | ||||
| 32 | WEST VIRGINIA | 73.0805 | ||||
| 33 | WASHINGTON | 72.3950 | ||||
| 34 | OKLAHOMA | 70.9096 | ||||
| 35 | OKLAHOMA STATE | 70.5466 | ||||
| 36 | NORTH CAROLINA STATE | 70.1959 | ||||
| 37 | MISSISSIPPI | 70.1498 | ||||
| 38 | ARIZONA STATE | 70.1373 | ||||
| 39 | TCU | 70.1371 | ||||
| 40 | KENTUCKY | 69.9577 | ||||
| 41 | TEXAS TECH | 69.9448 | ||||
| 42 | COLORADO STATE | 69.4864 | ||||
| 43 | ALABAMA | 68.5585 | ||||
| 44 | SMU | 66.8128 | ||||
| 45 | CALIFORNIA | 66.4295 | ||||
| 46 | LSU | 66.3272 | ||||
| 47 | BAYLOR | 66.1655 | ||||
| 48 | NORTH CAROLINA | 65.3689 | ||||
| 49 | RICE | 65.3614 | ||||
| 50 | WYOMING | 64.8960 | ||||
| 51 | AUBURN | 64.6080 | ||||
| 52 | IOWA STATE | 64.5868 | ||||
| 53 | STANFORD | 64.2026 | </ |