AP Polls
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
|---|---|---|---|---|---|---|---|
| 16 | Final | 1 | Texas | 2 | 1 | 65 | Big 12 (South) |
| 16 | Final | 2 | USC | 1 | 1 | Pac-10 | |
| 16 | Final | 3 | Penn State | 3 | Big Ten | ||
| 16 | Final | 4 | Ohio State | 4 | Big Ten | ||
| 16 | Final | 5 | West Virginia | 11 | 6 | Big East | |
| 16 | Final | 6 | LSU | 10 | 4 | SEC (West) | |
| 16 | Final | 7 | Virginia Tech | 12 | 5 | ACC (Coastal) | |
| 16 | Final | 8 | Alabama | 13 | 5 | SEC (West) | |
| 16 | Final | 9 | Notre Dame | 5 | 4 | Ind | |
| 16 | Final | 10 | Georgia | 8 | 2 | SEC (East) | |
| 16 | Final | 11 | Texas Christian | 14 | 3 | MWC | |
| 16 | Final | 12 | Florida | 16 | 4 | SEC (East) | |
| 16 | Final | 12 | Oregon | 6 | 6 | Pac-10 | |
| 16 | Final | 14 | Auburn | 7 | 7 | SEC (West) | |
| 16 | Final | 15 | Wisconsin | 21 | 6 | Big Ten | |
| 16 | Final | 16 | UCLA | 17 | 1 | Pac-10 | |
| 16 | Final | 17 | Miami (FL) | 9 | 8 | ACC (Coastal) | |
| 16 | Final | 18 | Boston College | 19 | 1 | ACC (Atlantic) | |
| 16 | Final | 19 | Louisville | 15 | 4 | Big East | |
| 16 | Final | 20 | Texas Tech | 18 | 2 | Big 12 (South) | |
| 16 | Final | 21 | Clemson | 23 | 2 | ACC (Atlantic) | |
| 16 | Final | 22 | Oklahoma | Big 12 (South) | |||
| 16 | Final | 23 | Florida State | 22 | 1 | ACC (Atlantic) | |
| 16 | Final | 24 | Nebraska | Big 12 (North) | |||
| 16 | Final | 25 | California | Pac-10 | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 15 | 2005-12-04 | 1 | USC (12-0) | 1 | 56 | Pac-10 | |
| 15 | 2005-12-04 | 2 | Texas (12-0) | 2 | 9 | Big 12 (South) | |
| 15 | 2005-12-04 | 3 | Penn State (10-1) | 4 | 1 | Big Ten | |
| 15 | 2005-12-04 | 4 | Ohio State (9-2) | 6 | 2 | Big Ten | |
| 15 | 2005-12-04 | 5 | Notre Dame (9-2) | 7 | 2 | Ind | |
| 15 | 2005-12-04 | 6 | Oregon (10-1) | 8 | 2 | Pac-10 | |
| 15 | 2005-12-04 | 7 | Auburn (9-2) | 9 | 2 | SEC (West) | |
| 15 | 2005-12-04 | 8 | Georgia (10-2) | 13 | 5 | SEC (East) | |
| 15 | 2005-12-04 | 9 | Miami (FL) (9-2) | 10 | 1 | ACC (Coastal) | |
| 15 | 2005-12-04 | 10 | LSU (10-2) | 3 | 7 | SEC (West) | |
| 15 | 2005-12-04 | 11 | West Virginia (10-1) | 12 | 1 | Big East | |
| 15 | 2005-12-04 | 12 | Virginia Tech (10-2) | 5 | 7 | ACC (Coastal) | |
| 15 | 2005-12-04 | 13 | Alabama (9-2) | 14 | 1 | SEC (West) | |
| 15 | 2005-12-04 | 14 | Texas Christian (10-1) | 15 | 1 | MWC | |
| 15 | 2005-12-04 | 15 | Louisville (9-2) | 16 | 1 | Big East | |
| 15 | 2005-12-04 | 16 | Florida (8-3) | 17 | 1 | SEC (East) | |
| 15 | 2005-12-04 | 17 | UCLA (9-2) | 11 | 6 | Pac-10 | |
| 15 | 2005-12-04 | 18 | Texas Tech (9-2) | 18 | Big 12 (South) | ||
| 15 | 2005-12-04 | 19 | Boston College (8-3) | 19 | ACC (Atlantic) | ||
| 15 | 2005-12-04 | 20 | Michigan (7-4) | 20 | Big Ten | ||
| 15 | 2005-12-04 | 21 | Wisconsin (9-3) | 21 | Big Ten | ||
| 15 | 2005-12-04 | 22 | Florida State (8-4) | ACC (Atlantic) | |||
| 15 | 2005-12-04 | 23 | Clemson (7-4) | 22 | 1 | ACC (Atlantic) | |
| 15 | 2005-12-04 | 24 | Georgia Tech (7-4) | 24 | ACC (Coastal) | ||
| 15 | 2005-12-04 | 25 | Iowa (7-4) | 25 | Big Ten | ||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 14 | 2005-11-27 | 1 | USC (11-0) | 1 | 55 | Pac-10 | |
| 14 | 2005-11-27 | 2 | Texas (11-0) | 2 | 10 | Big 12 (South) | |
| 14 | 2005-11-27 | 3 | LSU (10-1) | 3 | SEC (West) | ||
| 14 | 2005-11-27 | 4 | Penn State (10-1) | 4 | Big Ten | ||
| 14 | 2005-11-27 | 5 | Virginia Tech (10-1) | 5 | ACC (Coastal) | ||
| 14 | 2005-11-27 | 6 | Ohio State (9-2) | 7 | 1 | Big Ten | |
| 14 | 2005-11-27 | 7 | Notre Dame (9-2) | 6 | 1 | Ind | |
| 14 | 2005-11-27 | 8 | Oregon (10-1) | 8 | Pac-10 | ||
| 14 | 2005-11-27 | 9 | Auburn (9-2) | 9 | SEC (West) | ||
| 14 | 2005-11-27 | 10 | Miami (FL) (9-2) | 10 | ACC (Coastal) | ||
| 14 | 2005-11-27 | 11 | UCLA (9-1) | 11 | Pac-10 | ||
| 14 | 2005-11-27 | 12 | West Virginia (9-1) | 12 | Big East | ||
| 14 | 2005-11-27 | 13 | Georgia (9-2) | 13 | SEC (East) | ||
| 14 | 2005-11-27 | 14 | Alabama (9-2) | 14 | SEC (West) | ||
| 14 | 2005-11-27 | 15 | Texas Christian (10-1) | 15 | MWC | ||
| 14 | 2005-11-27 | 16 | Louisville (8-2) | 17 | 1 | Big East | |
| 14 | 2005-11-27 | 17 | Florida (8-3) | 19 | 2 | SEC (East) | |
| 14 | 2005-11-27 | 18 | Texas Tech (9-2) | 18 | Big 12 (South) | ||
| 14 | 2005-11-27 | 19 | Boston College (8-3) | 21 | 2 | ACC (Atlantic) | |
| 14 | 2005-11-27 | 20 | Michigan (7-4) | 22 | 2 | Big Ten | |
| 14 | 2005-11-27 | 21 | Wisconsin (9-3) | 24 | 3 | Big Ten | |
| 14 | 2005-11-27 | 22 | Clemson (7-4) | 25 | 3 | ACC (Atlantic) | |
| 14 | 2005-11-27 | 23 | Fresno State (8-3) | 16 | 7 | WAC | |
| 14 | 2005-11-27 | 24 | Georgia Tech (7-4) | 20 | 4 | ACC (Coastal) | |
| 14 | 2005-11-27 | 25 | Iowa (7-4) | Big Ten | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 13 | 2005-11-20 | 1 | USC (11-0) | 1 | 50 | Pac-10 | |
| 13 | 2005-11-20 | 2 | Texas (10-0) | 2 | 14 | Big 12 (South) | |
| 13 | 2005-11-20 | 3 | LSU (9-1) | 4 | 1 | SEC (West) | |
| 13 | 2005-11-20 | 4 | Penn State (10-1) | 5 | 1 | Big Ten | |
| 13 | 2005-11-20 | 5 | Virginia Tech (9-1) | 7 | 2 | ACC (Coastal) | |
| 13 | 2005-11-20 | 6 | Notre Dame (8-2) | 6 | Ind | ||
| 13 | 2005-11-20 | 7 | Ohio State (9-2) | 9 | 2 | Big Ten | |
| 13 | 2005-11-20 | 8 | Oregon (10-1) | 10 | 2 | Pac-10 | |
| 13 | 2005-11-20 | 9 | Auburn (9-2) | 11 | 2 | SEC (West) | |
| 13 | 2005-11-20 | 10 | Miami (FL) (8-2) | 3 | 7 | ACC (Coastal) | |
| 13 | 2005-11-20 | 11 | UCLA (9-1) | 12 | 1 | Pac-10 | |
| 13 | 2005-11-20 | 12 | West Virginia (8-1) | 13 | 1 | Big East | |
| 13 | 2005-11-20 | 13 | Georgia (8-2) | 14 | 1 | SEC (East) | |
| 13 | 2005-11-20 | 14 | Alabama (9-2) | 8 | 6 | SEC (West) | |
| 13 | 2005-11-20 | 15 | Texas Christian (10-1) | 15 | MWC | ||
| 13 | 2005-11-20 | 16 | Fresno State (8-2) | 16 | WAC | ||
| 13 | 2005-11-20 | 17 | Louisville (7-2) | 18 | 1 | Big East | |
| 13 | 2005-11-20 | 18 | Texas Tech (9-2) | 21 | 3 | Big 12 (South) | |
| 13 | 2005-11-20 | 19 | Florida (7-3) | 20 | 1 | SEC (East) | |
| 13 | 2005-11-20 | 20 | Georgia Tech (7-3) | ACC (Coastal) | |||
| 13 | 2005-11-20 | 21 | Boston College (8-3) | 23 | 2 | ACC (Atlantic) | |
| 13 | 2005-11-20 | 22 | Michigan (7-4) | 17 | 5 | Big Ten | |
| 13 | 2005-11-20 | 23 | Florida State (7-3) | 22 | 1 | ACC (Atlantic) | |
| 13 | 2005-11-20 | 24 | Wisconsin (8-3) | 25 | 1 | Big Ten | |
| 13 | 2005-11-20 | 25 | Clemson (7-4) | ACC (Atlantic) | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 12 | 2005-11-13 | 1 | USC (10-0) | 1 | 56 | Pac-10 | |
| 12 | 2005-11-13 | 2 | Texas (10-0) | 2 | 9 | Big 12 (South) | |
| 12 | 2005-11-13 | 3 | Miami (FL) (8-1) | 3 | ACC (Coastal) | ||
| 12 | 2005-11-13 | 4 | LSU (8-1) | 5 | 1 | SEC (West) | |
| 12 | 2005-11-13 | 5 | Penn State (9-1) | 6 | 1 | Big Ten | |
| 12 | 2005-11-13 | 6 | Notre Dame (7-2) | 7 | 1 | Ind | |
| 12 | 2005-11-13 | 7 | Virginia Tech (8-1) | 8 | 1 | ACC (Coastal) | |
| 12 | 2005-11-13 | 8 | Alabama (9-1) | 4 | 4 | SEC (West) | |
| 12 | 2005-11-13 | 9 | Ohio State (8-2) | 10 | 1 | Big Ten | |
| 12 | 2005-11-13 | 10 | Oregon (9-1) | 11 | 1 | Pac-10 | |
| 12 | 2005-11-13 | 11 | Auburn (8-2) | 15 | 4 | SEC (West) | |
| 12 | 2005-11-13 | 12 | UCLA (9-1) | 14 | 2 | Pac-10 | |
| 12 | 2005-11-13 | 13 | West Virginia (8-1) | 16 | 3 | Big East | |
| 12 | 2005-11-13 | 14 | Georgia (7-2) | 9 | 5 | SEC (East) | |
| 12 | 2005-11-13 | 15 | Texas Christian (10-1) | 18 | 3 | MWC | |
| 12 | 2005-11-13 | 16 | Fresno State (8-1) | 20 | 4 | WAC | |
| 12 | 2005-11-13 | 17 | Michigan (7-3) | 21 | 4 | Big Ten | |
| 12 | 2005-11-13 | 18 | Louisville (7-2) | 23 | 5 | Big East | |
| 12 | 2005-11-13 | 19 | South Carolina (7-3) | SEC (East) | |||
| 12 | 2005-11-13 | 20 | Florida (7-3) | 12 | 8 | SEC (East) | |
| 12 | 2005-11-13 | 21 | Texas Tech (8-2) | 13 | 8 | Big 12 (South) | |
| 12 | 2005-11-13 | 22 | Florida State (7-3) | 17 | 5 | ACC (Atlantic) | |
| 12 | 2005-11-13 | 23 | Boston College (7-3) | ACC (Atlantic) | |||
| 12 | 2005-11-13 | 24 | UTEP (8-1) | CUSA (West) | |||
| 12 | 2005-11-13 | 25 | Wisconsin (8-3) | 19 | 6 | Big Ten | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 11 | 2005-11-06 | 1 | USC (9-0) | 1 | 57 | Pac-10 | |
| 11 | 2005-11-06 | 2 | Texas (9-0) | 2 | 8 | Big 12 (South) | |
| 11 | 2005-11-06 | 3 | Miami (FL) (7-1) | 5 | 2 | ACC (Coastal) | |
| 11 | 2005-11-06 | 4 | Alabama (9-0) | 4 | SEC (West) | ||
| 11 | 2005-11-06 | 5 | LSU (7-1) | 6 | 1 | SEC (West) | |
| 11 | 2005-11-06 | 6 | Penn State (9-1) | 10 | 4 | Big Ten | |
| 11 | 2005-11-06 | 7 | Notre Dame (6-2) | 8 | 1 | Ind | |
| 11 | 2005-11-06 | 8 | Virginia Tech (8-1) | 3 | 5 | ACC (Coastal) | |
| 11 | 2005-11-06 | 9 | Georgia (7-1) | 11 | 2 | SEC (East) | |
| 11 | 2005-11-06 | 10 | Ohio State (7-2) | 12 | 2 | Big Ten | |
| 11 | 2005-11-06 | 11 | Oregon (8-1) | 15 | 4 | Pac-10 | |
| 11 | 2005-11-06 | 12 | Florida (7-2) | 13 | 1 | SEC (East) | |
| 11 | 2005-11-06 | 13 | Texas Tech (8-1) | 16 | 3 | Big 12 (South) | |
| 11 | 2005-11-06 | 14 | UCLA (8-1) | 7 | 7 | Pac-10 | |
| 11 | 2005-11-06 | 15 | Auburn (7-2) | 17 | 2 | SEC (West) | |
| 11 | 2005-11-06 | 16 | West Virginia (7-1) | 18 | 2 | Big East | |
| 11 | 2005-11-06 | 17 | Florida State (7-2) | 9 | 8 | ACC (Atlantic) | |
| 11 | 2005-11-06 | 18 | Texas Christian (9-1) | 20 | 2 | MWC | |
| 11 | 2005-11-06 | 19 | Wisconsin (8-2) | 14 | 5 | Big Ten | |
| 11 | 2005-11-06 | 20 | Fresno State (7-1) | 21 | 1 | WAC | |
| 11 | 2005-11-06 | 21 | Michigan (6-3) | 22 | 1 | Big Ten | |
| 11 | 2005-11-06 | 22 | Colorado (7-2) | 25 | 3 | Big 12 (North) | |
| 11 | 2005-11-06 | 23 | Louisville (6-2) | 24 | 1 | Big East | |
| 11 | 2005-11-06 | 24 | Georgia Tech (6-2) | ACC (Coastal) | |||
| 11 | 2005-11-06 | 25 | Northwestern (6-3) | Big Ten | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 10 | 2005-10-30 | 1 | USC (8-0) | 1 | 57 | Pac-10 | |
| 10 | 2005-10-30 | 2 | Texas (8-0) | 2 | 8 | Big 12 (South) | |
| 10 | 2005-10-30 | 3 | Virginia Tech (8-0) | 3 | ACC (Coastal) | ||
| 10 | 2005-10-30 | 4 | Alabama (8-0) | 5 | 1 | SEC (West) | |
| 10 | 2005-10-30 | 5 | Miami (FL) (6-1) | 6 | 1 | ACC (Coastal) | |
| 10 | 2005-10-30 | 6 | LSU (6-1) | 7 | 1 | SEC (West) | |
| 10 | 2005-10-30 | 7 | UCLA (8-0) | 8 | 1 | Pac-10 | |
| 10 | 2005-10-30 | 8 | Notre Dame (5-2) | 9 | 1 | Ind | |
| 10 | 2005-10-30 | 9 | Florida State (7-1) | 10 | 1 | ACC (Atlantic) | |
| 10 | 2005-10-30 | 10 | Penn State (8-1) | 11 | 1 | Big Ten | |
| 10 | 2005-10-30 | 11 | Georgia (7-1) | 4 | 7 | SEC (East) | |
| 10 | 2005-10-30 | 12 | Ohio State (6-2) | 12 | Big Ten | ||
| 10 | 2005-10-30 | 13 | Florida (6-2) | 16 | 3 | SEC (East) | |
| 10 | 2005-10-30 | 14 | Wisconsin (8-1) | 15 | 1 | Big Ten | |
| 10 | 2005-10-30 | 15 | Oregon (7-1) | 14 | 1 | Pac-10 | |
| 10 | 2005-10-30 | 16 | Texas Tech (7-1) | 17 | 1 | Big 12 (South) | |
| 10 | 2005-10-30 | 17 | Auburn (6-2) | 19 | 2 | SEC (West) | |
| 10 | 2005-10-30 | 18 | West Virginia (6-1) | 18 | Big East | ||
| 10 | 2005-10-30 | 19 | Boston College (6-2) | 13 | 6 | ACC (Atlantic) | |
| 10 | 2005-10-30 | 20 | Texas Christian (8-1) | 20 | MWC | ||
| 10 | 2005-10-30 | 21 | Fresno State (6-1) | 22 | 1 | WAC | |
| 10 | 2005-10-30 | 22 | Michigan (6-3) | 25 | 3 | Big Ten | |
| 10 | 2005-10-30 | 23 | California (6-2) | 24 | 1 | Pac-10 | |
| 10 | 2005-10-30 | 24 | Louisville (5-2) | Big East | |||
| 10 | 2005-10-30 | 25 | Colorado (6-2) | Big 12 (North) | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 9 | 2005-10-23 | 1 | USC (7-0) | 1 | 55 | Pac-10 | |
| 9 | 2005-10-23 | 2 | Texas (7-0) | 2 | 10 | Big 12 (South) | |
| 9 | 2005-10-23 | 3 | Virginia Tech (7-0) | 3 | ACC (Coastal) | ||
| 9 | 2005-10-23 | 4 | Georgia (7-0) | 4 | SEC (East) | ||
| 9 | 2005-10-23 | 5 | Alabama (7-0) | 5 | SEC (West) | ||
| 9 | 2005-10-23 | 6 | Miami (FL) (5-1) | 6 | ACC (Coastal) | ||
| 9 | 2005-10-23 | 7 | LSU (5-1) | 7 | SEC (West) | ||
| 9 | 2005-10-23 | 8 | UCLA (7-0) | 8 | Pac-10 | ||
| 9 | 2005-10-23 | 9 | Notre Dame (5-2) | 9 | Ind | ||
| 9 | 2005-10-23 | 10 | Florida State (6-1) | 11 | 1 | ACC (Atlantic) | |
| 9 | 2005-10-23 | 11 | Penn State (7-1) | 12 | 1 | Big Ten | |
| 9 | 2005-10-23 | 12 | Ohio State (5-2) | 14 | 2 | Big Ten | |
| 9 | 2005-10-23 | 13 | Boston College (6-1) | 13 | ACC (Atlantic) | ||
| 9 | 2005-10-23 | 14 | Oregon (7-1) | 15 | 1 | Pac-10 | |
| 9 | 2005-10-23 | 15 | Wisconsin (7-1) | 19 | 4 | Big Ten | |
| 9 | 2005-10-23 | 16 | Florida (5-2) | 18 | 2 | SEC (East) | |
| 9 | 2005-10-23 | 17 | Texas Tech (6-1) | 10 | 7 | Big 12 (South) | |
| 9 | 2005-10-23 | 18 | West Virginia (6-1) | 20 | 2 | Big East | |
| 9 | 2005-10-23 | 19 | Auburn (5-2) | 16 | 3 | SEC (West) | |
| 9 | 2005-10-23 | 20 | Texas Christian (7-1) | 21 | 1 | MWC | |
| 9 | 2005-10-23 | 21 | Northwestern (5-2) | Big Ten | |||
| 9 | 2005-10-23 | 22 | Fresno State (5-1) | 24 | 2 | WAC | |
| 9 | 2005-10-23 | 23 | Tennessee (3-3) | 17 | 6 | SEC (East) | |
| 9 | 2005-10-23 | 24 | California (6-2) | 25 | 1 | Pac-10 | |
| 9 | 2005-10-23 | 25 | Michigan (5-3) | Big Ten | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 8 | 2005-10-16 | 1 | USC (6-0) | 1 | 57 | Pac-10 | |
| 8 | 2005-10-16 | 2 | Texas (6-0) | 2 | 8 | Big 12 (South) | |
| 8 | 2005-10-16 | 3 | Virginia Tech (6-0) | 3 | ACC (Coastal) | ||
| 8 | 2005-10-16 | 4 | Georgia (6-0) | 5 | 1 | SEC (East) | |
| 8 | 2005-10-16 | 5 | Alabama (6-0) | 6 | 1 | SEC (West) | |
| 8 | 2005-10-16 | 6 | Miami (FL) (5-1) | 7 | 1 | ACC (Coastal) | |
| 8 | 2005-10-16 | 7 | LSU (4-1) | 10 | 3 | SEC (West) | |
| 8 | 2005-10-16 | 8 | UCLA (6-0) | 12 | 4 | Pac-10 | |
| 8 | 2005-10-16 | 9 | Notre Dame (4-2) | 9 | Ind | ||
| 8 | 2005-10-16 | 10 | Texas Tech (6-0) | 13 | 3 | Big 12 (South) | |
| 8 | 2005-10-16 | 11 | Florida State (5-1) | 4 | 7 | ACC (Atlantic) | |
| 8 | 2005-10-16 | 12 | Penn State (6-1) | 8 | 4 | Big Ten | |
| 8 | 2005-10-16 | 13 | Boston College (6-1) | 14 | 1 | ACC (Atlantic) | |
| 8 | 2005-10-16 | 14 | Ohio State (4-2) | 15 | 1 | Big Ten | |
| 8 | 2005-10-16 | 15 | Oregon (6-1) | 20 | 5 | Pac-10 | |
| 8 | 2005-10-16 | 16 | Auburn (5-1) | 21 | 5 | SEC (West) | |
| 8 | 2005-10-16 | 17 | Tennessee (3-2) | 17 | SEC (East) | ||
| 8 | 2005-10-16 | 18 | Florida (5-2) | 11 | 7 | SEC (East) | |
| 8 | 2005-10-16 | 19 | Wisconsin (6-1) | 23 | 4 | Big Ten | |
| 8 | 2005-10-16 | 20 | West Virginia (6-1) | Big East | |||
| 8 | 2005-10-16 | 21 | Texas Christian (6-1) | 25 | 4 | MWC | |
| 8 | 2005-10-16 | 22 | Michigan State (4-2) | 16 | 6 | Big Ten | |
| 8 | 2005-10-16 | 23 | Virginia (4-2) | ACC (Coastal) | |||
| 8 | 2005-10-16 | 24 | Fresno State (4-1) | WAC | |||
| 8 | 2005-10-16 | 25 | California (5-2) | 18 | 7 | Pac-10 | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 7 | 2005-10-09 | 1 | USC (5-0) | 1 | 58 | Pac-10 | |
| 7 | 2005-10-09 | 2 | Texas (5-0) | 2 | 7 | Big 12 (South) | |
| 7 | 2005-10-09 | 3 | Virginia Tech (6-0) | 3 | ACC (Coastal) | ||
| 7 | 2005-10-09 | 4 | Florida State (5-0) | 4 | ACC (Atlantic) | ||
| 7 | 2005-10-09 | 5 | Georgia (5-0) | 5 | SEC (East) | ||
| 7 | 2005-10-09 | 6 | Alabama (5-0) | 7 | 1 | SEC (West) | |
| 7 | 2005-10-09 | 7 | Miami (FL) (4-1) | 9 | 2 | ACC (Coastal) | |
| 7 | 2005-10-09 | 8 | Penn State (6-0) | 16 | 8 | Big Ten | |
| 7 | 2005-10-09 | 9 | Notre Dame (4-1) | 12 | 3 | Ind | |
| 7 | 2005-10-09 | 10 | LSU (3-1) | 11 | 1 | SEC (West) | |
| 7 | 2005-10-09 | 11 | Florida (5-1) | 13 | 2 | SEC (East) | |
| 7 | 2005-10-09 | 12 | UCLA (5-0) | 20 | 8 | Pac-10 | |
| 7 | 2005-10-09 | 13 | Texas Tech (5-0) | 15 | 2 | Big 12 (South) | |
| 7 | 2005-10-09 | 14 | Boston College (5-1) | 18 | 4 | ACC (Atlantic) | |
| 7 | 2005-10-09 | 15 | Ohio State (3-2) | 6 | 9 | Big Ten | |
| 7 | 2005-10-09 | 16 | Michigan State (4-1) | 19 | 3 | Big Ten | |
| 7 | 2005-10-09 | 17 | Tennessee (3-2) | 8 | 9 | SEC (East) | |
| 7 | 2005-10-09 | 18 | California (5-1) | 10 | 8 | Pac-10 | |
| 7 | 2005-10-09 | 19 | Louisville (4-1) | 23 | 4 | Big East | |
| 7 | 2005-10-09 | 20 | Oregon (5-1) | 25 | 5 | Pac-10 | |
| 7 | 2005-10-09 | 21 | Auburn (4-1) | 22 | 1 | SEC (West) | |
| 7 | 2005-10-09 | 22 | Minnesota (5-1) | Big Ten | |||
| 7 | 2005-10-09 | 23 | Wisconsin (5-1) | 14 | 9 | Big Ten | |
| 7 | 2005-10-09 | 24 | Colorado (4-1) | Big 12 (North) | |||
| 7 | 2005-10-09 | 25 | Texas Christian (5-1) | MWC | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 6 | 2005-10-02 | 1 | USC (4-0) | 1 | 59 | Pac-10 | |
| 6 | 2005-10-02 | 2 | Texas (4-0) | 2 | 6 | Big 12 (South) | |
| 6 | 2005-10-02 | 3 | Virginia Tech (5-0) | 3 | ACC (Coastal) | ||
| 6 | 2005-10-02 | 4 | Florida State (4-0) | 6 | 2 | ACC (Atlantic) | |
| 6 | 2005-10-02 | 5 | Georgia (4-0) | 7 | 2 | SEC (East) | |
| 6 | 2005-10-02 | 6 | Ohio State (3-1) | 8 | 2 | Big Ten | |
| 6 | 2005-10-02 | 7 | Alabama (5-0) | 15 | 8 | SEC (West) | |
| 6 | 2005-10-02 | 8 | Tennessee (3-1) | 10 | 2 | SEC (East) | |
| 6 | 2005-10-02 | 9 | Miami (FL) (3-1) | 9 | ACC (Coastal) | ||
| 6 | 2005-10-02 | 10 | California (5-0) | 12 | 2 | Pac-10 | |
| 6 | 2005-10-02 | 11 | LSU (2-1) | 4 | 7 | SEC (West) | |
| 6 | 2005-10-02 | 12 | Notre Dame (4-1) | 13 | 1 | Ind | |
| 6 | 2005-10-02 | 13 | Florida (4-1) | 5 | 8 | SEC (East) | |
| 6 | 2005-10-02 | 14 | Wisconsin (5-0) | 17 | 3 | Big Ten | |
| 6 | 2005-10-02 | 15 | Texas Tech (4-0) | 16 | 1 | Big 12 (South) | |
| 6 | 2005-10-02 | 16 | Penn State (5-0) | Big Ten | |||
| 6 | 2005-10-02 | 17 | Arizona State (3-2) | 14 | 3 | Pac-10 | |
| 6 | 2005-10-02 | 18 | Boston College (4-1) | 21 | 3 | ACC (Atlantic) | |
| 6 | 2005-10-02 | 19 | Michigan State (4-1) | 11 | 8 | Big Ten | |
| 6 | 2005-10-02 | 20 | UCLA (4-0) | 20 | Pac-10 | ||
| 6 | 2005-10-02 | 21 | Michigan (3-2) | Big Ten | |||
| 6 | 2005-10-02 | 22 | Auburn (4-1) | SEC (West) | |||
| 6 | 2005-10-02 | 23 | Louisville (3-1) | 24 | 1 | Big East | |
| 6 | 2005-10-02 | 24 | Georgia Tech (3-1) | 25 | 1 | ACC (Coastal) | |
| 6 | 2005-10-02 | 25 | Oregon (4-1) | Pac-10 | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 5 | 2005-09-25 | 1 | USC (3-0) | 1 | 59 | Pac-10 | |
| 5 | 2005-09-25 | 2 | Texas (3-0) | 2 | 6 | Big 12 (South) | |
| 5 | 2005-09-25 | 3 | Virginia Tech (4-0) | 4 | 1 | ACC (Coastal) | |
| 5 | 2005-09-25 | 4 | LSU (1-0) | 3 | 1 | SEC (West) | |
| 5 | 2005-09-25 | 5 | Florida (4-0) | 5 | SEC (East) | ||
| 5 | 2005-09-25 | 6 | Florida State (3-0) | 6 | ACC (Atlantic) | ||
| 5 | 2005-09-25 | 7 | Georgia (4-0) | 7 | SEC (East) | ||
| 5 | 2005-09-25 | 8 | Ohio State (3-1) | 8 | Big Ten | ||
| 5 | 2005-09-25 | 9 | Miami (FL) (2-1) | 12 | 3 | ACC (Coastal) | |
| 5 | 2005-09-25 | 10 | Tennessee (1-1) | 10 | SEC (East) | ||
| 5 | 2005-09-25 | 11 | Michigan State (4-0) | 17 | 6 | Big Ten | |
| 5 | 2005-09-25 | 12 | California (4-0) | 13 | 1 | Pac-10 | |
| 5 | 2005-09-25 | 13 | Notre Dame (3-1) | 16 | 3 | Ind | |
| 5 | 2005-09-25 | 14 | Arizona State (3-1) | 18 | 4 | Pac-10 | |
| 5 | 2005-09-25 | 15 | Alabama (4-0) | 20 | 5 | SEC (West) | |
| 5 | 2005-09-25 | 16 | Texas Tech (3-0) | 19 | 3 | Big 12 (South) | |
| 5 | 2005-09-25 | 17 | Wisconsin (4-0) | Big Ten | |||
| 5 | 2005-09-25 | 18 | Minnesota (4-0) | Big Ten | |||
| 5 | 2005-09-25 | 19 | Virginia (3-0) | 23 | 4 | ACC (Coastal) | |
| 5 | 2005-09-25 | 20 | UCLA (3-0) | 25 | 5 | Pac-10 | |
| 5 | 2005-09-25 | 21 | Boston College (3-1) | ACC (Atlantic) | |||
| 5 | 2005-09-25 | 22 | Purdue (2-1) | 11 | 11 | Big Ten | |
| 5 | 2005-09-25 | 23 | Iowa State (3-0) | 22 | 1 | Big 12 (North) | |
| 5 | 2005-09-25 | 24 | Louisville (2-1) | 9 | 15 | Big East | |
| 5 | 2005-09-25 | 25 | Georgia Tech (3-1) | 15 | 10 | ACC (Coastal) | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 4 | 2005-09-18 | 1 | USC (2-0) | 1 | 57 | Pac-10 | |
| 4 | 2005-09-18 | 2 | Texas (3-0) | 2 | 8 | Big 12 (South) | |
| 4 | 2005-09-18 | 3 | LSU (1-0) | 3 | SEC (West) | ||
| 4 | 2005-09-18 | 4 | Virginia Tech (3-0) | 4 | ACC (Coastal) | ||
| 4 | 2005-09-18 | 5 | Florida (3-0) | 6 | 1 | SEC (East) | |
| 4 | 2005-09-18 | 6 | Florida State (3-0) | 8 | 2 | ACC (Atlantic) | |
| 4 | 2005-09-18 | 7 | Georgia (3-0) | 7 | SEC (East) | ||
| 4 | 2005-09-18 | 8 | Ohio State (2-1) | 9 | 1 | Big Ten | |
| 4 | 2005-09-18 | 9 | Louisville (2-0) | 11 | 2 | Big East | |
| 4 | 2005-09-18 | 10 | Tennessee (1-1) | 5 | 5 | SEC (East) | |
| 4 | 2005-09-18 | 11 | Purdue (2-0) | 12 | 1 | Big Ten | |
| 4 | 2005-09-18 | 12 | Miami (FL) (1-1) | 13 | 1 | ACC (Coastal) | |
| 4 | 2005-09-18 | 13 | California (3-0) | 15 | 2 | Pac-10 | |
| 4 | 2005-09-18 | 14 | Michigan (2-1) | 14 | Big Ten | ||
| 4 | 2005-09-18 | 15 | Georgia Tech (3-0) | 16 | 1 | ACC (Coastal) | |
| 4 | 2005-09-18 | 16 | Notre Dame (2-1) | 10 | 6 | Ind | |
| 4 | 2005-09-18 | 17 | Michigan State (3-0) | Big Ten | |||
| 4 | 2005-09-18 | 18 | Arizona State (2-1) | 18 | Pac-10 | ||
| 4 | 2005-09-18 | 19 | Texas Tech (2-0) | 19 | Big 12 (South) | ||
| 4 | 2005-09-18 | 20 | Alabama (3-0) | SEC (West) | |||
| 4 | 2005-09-18 | 21 | Iowa (2-1) | 22 | 1 | Big Ten | |
| 4 | 2005-09-18 | 22 | Iowa State (2-0) | 24 | 2 | Big 12 (North) | |
| 4 | 2005-09-18 | 23 | Virginia (2-0) | 25 | 2 | ACC (Coastal) | |
| 4 | 2005-09-18 | 24 | Oregon (3-0) | Pac-10 | |||
| 4 | 2005-09-18 | 25 | UCLA (3-0) | Pac-10 | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 3 | 2005-09-11 | 1 | USC (1-0) | 1 | 56 | Pac-10 | |
| 3 | 2005-09-11 | 2 | Texas (2-0) | 2 | 8 | Big 12 (South) | |
| 3 | 2005-09-11 | 3 | LSU (1-0) | 5 | 2 | SEC (West) | |
| 3 | 2005-09-11 | 4 | Virginia Tech (2-0) | 7 | 3 | ACC (Coastal) | |
| 3 | 2005-09-11 | 5 | Tennessee (1-0) | 6 | 1 | SEC (East) | |
| 3 | 2005-09-11 | 6 | Florida (2-0) | 10 | 4 | SEC (East) | |
| 3 | 2005-09-11 | 7 | Georgia (2-0) | 9 | 2 | SEC (East) | |
| 3 | 2005-09-11 | 8 | Florida State (2-0) | 11 | 3 | ACC (Atlantic) | |
| 3 | 2005-09-11 | 9 | Ohio State (1-1) | 4 | 5 | Big Ten | |
| 3 | 2005-09-11 | 10 | Notre Dame (2-0) | 20 | 10 | Ind | |
| 3 | 2005-09-11 | 11 | Louisville (1-0) | 12 | 1 | Big East | |
| 3 | 2005-09-11 | 12 | Purdue (1-0) | 13 | 1 | Big Ten | |
| 3 | 2005-09-11 | 13 | Miami (FL) (0-1) | 14 | 1 | ACC (Coastal) | |
| 3 | 2005-09-11 | 14 | Michigan (1-1) | 3 | 11 | Big Ten | |
| 3 | 2005-09-11 | 15 | California (2-0) | 16 | 1 | Pac-10 | |
| 3 | 2005-09-11 | 16 | Georgia Tech (2-0) | 17 | 1 | ACC (Coastal) | |
| 3 | 2005-09-11 | 17 | Boston College (2-0) | 19 | 2 | ACC (Atlantic) | |
| 3 | 2005-09-11 | 18 | Arizona State (1-1) | 15 | 3 | Pac-10 | |
| 3 | 2005-09-11 | 19 | Texas Tech (1-0) | 21 | 2 | Big 12 (South) | |
| 3 | 2005-09-11 | 20 | Clemson (2-0) | 25 | 5 | ACC (Atlantic) | |
| 3 | 2005-09-11 | 21 | Oklahoma (1-1) | 18 | 3 | Big 12 (South) | |
| 3 | 2005-09-11 | 22 | Iowa (1-1) | 8 | 14 | Big Ten | |
| 3 | 2005-09-11 | 23 | Fresno State (1-0) | 24 | 1 | WAC | |
| 3 | 2005-09-11 | 24 | Iowa State (2-0) | Big 12 (North) | |||
| 3 | 2005-09-11 | 25 | Virginia (1-0) | 23 | 2 | ACC (Coastal) | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 2 | 2005-09-06 | 1 | USC (1-0) | 1 | 61 | Pac-10 | |
| 2 | 2005-09-06 | 2 | Texas (1-0) | 2 | 4 | Big 12 (South) | |
| 2 | 2005-09-06 | 3 | Michigan (1-0) | 4 | 1 | Big Ten | |
| 2 | 2005-09-06 | 4 | Ohio State (1-0) | 6 | 2 | Big Ten | |
| 2 | 2005-09-06 | 5 | LSU | 5 | SEC (West) | ||
| 2 | 2005-09-06 | 6 | Tennessee (1-0) | 3 | 3 | SEC (East) | |
| 2 | 2005-09-06 | 7 | Virginia Tech (1-0) | 8 | 1 | ACC (Coastal) | |
| 2 | 2005-09-06 | 8 | Iowa (1-0) | 11 | 3 | Big Ten | |
| 2 | 2005-09-06 | 9 | Georgia (1-0) | 13 | 4 | SEC (East) | |
| 2 | 2005-09-06 | 10 | Florida (1-0) | 10 | SEC (East) | ||
| 2 | 2005-09-06 | 11 | Florida State (1-0) | 14 | 3 | ACC (Atlantic) | |
| 2 | 2005-09-06 | 12 | Louisville (1-0) | 12 | Big East | ||
| 2 | 2005-09-06 | 13 | Purdue | 15 | 2 | Big Ten | |
| 2 | 2005-09-06 | 14 | Miami (FL) (0-1) | 9 | 5 | ACC (Coastal) | |
| 2 | 2005-09-06 | 15 | Arizona State (1-0) | 20 | 5 | Pac-10 | |
| 2 | 2005-09-06 | 16 | California (1-0) | 19 | 3 | Pac-10 | |
| 2 | 2005-09-06 | 17 | Georgia Tech (1-0) | ACC (Coastal) | |||
| 2 | 2005-09-06 | 18 | Oklahoma (0-1) | 7 | 11 | Big 12 (South) | |
| 2 | 2005-09-06 | 19 | Boston College (1-0) | 22 | 3 | ACC (Atlantic) | |
| 2 | 2005-09-06 | 20 | Notre Dame (1-0) | Ind | |||
| 2 | 2005-09-06 | 21 | Texas Tech | 21 | Big 12 (South) | ||
| 2 | 2005-09-06 | 22 | Texas Christian (1-0) | MWC | |||
| 2 | 2005-09-06 | 23 | Virginia (1-0) | 25 | 2 | ACC (Coastal) | |
| 2 | 2005-09-06 | 24 | Fresno State | 24 | WAC | ||
| 2 | 2005-09-06 | 25 | Clemson (1-0) | ACC (Atlantic) | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 1 | Preseason | 1 | USC | NA | — | 60 | Pac-10 |
| 1 | Preseason | 2 | Texas | NA | — | 4 | Big 12 (South) |
| 1 | Preseason | 3 | Tennessee | NA | — | SEC (East) | |
| 1 | Preseason | 4 | Michigan | NA | — | Big Ten | |
| 1 | Preseason | 5 | LSU | NA | — | SEC (West) | |
| 1 | Preseason | 6 | Ohio State | NA | — | Big Ten | |
| 1 | Preseason | 7 | Oklahoma | NA | — | Big 12 (South) | |
| 1 | Preseason | 8 | Virginia Tech | NA | — | ACC (Coastal) | |
| 1 | Preseason | 9 | Miami (FL) | NA | — | ACC (Coastal) | |
| 1 | Preseason | 10 | Florida | NA | — | SEC (East) | |
| 1 | Preseason | 11 | Iowa | NA | — | Big Ten | |
| 1 | Preseason | 12 | Louisville | NA | — | 1 | Big East |
| 1 | Preseason | 13 | Georgia | NA | — | SEC (East) | |
| 1 | Preseason | 14 | Florida State | NA | — | ACC (Atlantic) | |
| 1 | Preseason | 15 | Purdue | NA | — | Big Ten | |
| 1 | Preseason | 16 | Auburn | NA | — | SEC (West) | |
| 1 | Preseason | 17 | Texas A&M | NA | — | Big 12 (South) | |
| 1 | Preseason | 18 | Boise State | NA | — | WAC | |
| 1 | Preseason | 19 | California | NA | — | Pac-10 | |
| 1 | Preseason | 20 | Arizona State | NA | — | Pac-10 | |
| 1 | Preseason | 21 | Texas Tech | NA | — | Big 12 (South) | |
| 1 | Preseason | 22 | Boston College | NA | — | ACC (Atlantic) | |
| 1 | Preseason | 23 | Pitt | NA | — | Big East | |
| 1 | Preseason | 24 | Fresno State | NA | — | WAC | |
| 1 | Preseason | 25 | Virginia | NA | — | ACC (Coastal) |
BCS Playoff Standings