1998 NCAA Division I-A football rankings AP poll AP poll

| Preseason | Week_1_Sept_7 | Week_2_Sept_14 | Week_3_Sept_21 | Week_4_Sept_28 | Week_5_Oct_5 | Week_6_Oct_12 | Week_7_Oct_19 | Week_8_Oct_26 | Week_9_Nov_2 | Week_10_Nov_9 | Week_11_Nov_16 | Week_12_Nov_23 | Week_13_Nov_30 | Week_14_Dec_7 | Week_15_Final_Jan_5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Texas A&M | Arizona State (0-1) | Wisconsin (2-0) | Wisconsin (3-0) | Arizona (4-0) | Colorado (5-0) | Virginia Tech (5-0) | Arizona (6-1) | Arkansas (6-0) | Nebraska (7-2) | Tulane (8-0) | Georgia (7-2) | Nebraska (8-3) | Virginia (9-2) | Nebraska (9-3) | Georgia (9-3) |
| Colorado State | Georgia (1-0) | Colorado (2-0) | Colorado (3-0) | Colorado (4-0) | Oregon (4-0) | West Virginia (4-1) | Arkansas (6-0) | Virginia (6-1) | Syracuse (5-2) Tulane (7-0) Virginia Tech (7-1) | Michigan (7-2) | Oregon (8-2) | Michigan (8-3) | Michigan (9-3) | Michigan (9-3) | Texas (9-3) |
| Virginia | Colorado (1-0) | Arizona (2-0) | Arizona (3-0) | West Virginia (2-1) | West Virginia (3-1) | Arizona (5-1) | Virginia (5-1) | Notre Dame (5-1) | N/A | Virginia Tech (7-1) | Penn State (7-2) | Virginia (8-2) | Notre Dame (9-2) | Air Force (11-1) | Arkansas (9-3) |