AP Polls
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
|---|---|---|---|---|---|---|---|
| 9 | Final | 1 | Michigan | 1 | 192 | Western | |
| 9 | Final | 2 | Notre Dame | 2 | 97 | Ind | |
| 9 | Final | 3 | North Carolina | 4 | 1 | 31 | Southern |
| 9 | Final | 4 | California | 5 | 1 | 5 | PCC |
| 9 | Final | 5 | Oklahoma | 6 | 1 | 30 | Big 7 |
| 9 | Final | 6 | Army | 3 | 3 | Ind | |
| 9 | Final | 7 | Northwestern | 7 | Western | ||
| 9 | Final | 8 | Georgia | 12 | 4 | 5 | SEC |
| 9 | Final | 9 | Oregon | 10 | 1 | PCC | |
| 9 | Final | 10 | SMU | 8 | 2 | SWC | |
| 9 | Final | 11 | Clemson | 9 | 2 | 6 | Southern |
| 9 | Final | 12 | Vanderbilt | 15 | 3 | 2 | SEC |
| 9 | Final | 13 | Tulane | 14 | 1 | SEC | |
| 9 | Final | 14 | Michigan State | 11 | 3 | 2 | Ind |
| 9 | Final | 15 | Ole Miss | 16 | 1 | 13 | SEC |
| 9 | Final | 16 | Minnesota | 13 | 3 | Western | |
| 9 | Final | 17 | William & Mary | 20 | 3 | Southern | |
| 9 | Final | 18 | Penn State | 18 | Ind | ||
| 9 | Final | 19 | Cornell | Ind | |||
| 9 | Final | 20 | Wake Forest | Southern | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 8 | 1948-11-22 | 1 | Michigan (9-0-0) | 1 | 105 | Western | |
| 8 | 1948-11-22 | 2 | Notre Dame (8-0-0) | 2 | 38 | Ind | |
| 8 | 1948-11-22 | 3 | Army (8-0-0) | 3 | 5 | Ind | |
| 8 | 1948-11-22 | 4 | North Carolina (8-0-1) | 5 | 1 | 14 | Southern |
| 8 | 1948-11-22 | 5 | California (10-0-0) | 4 | 1 | 3 | PCC |
| 8 | 1948-11-22 | 6 | Oklahoma (8-1-0) | 8 | 2 | 13 | Big 7 |
| 8 | 1948-11-22 | 7 | Northwestern (7-2-0) | 7 | Western | ||
| 8 | 1948-11-22 | 8 | SMU (8-1-0) | 10 | 2 | SWC | |
| 8 | 1948-11-22 | 9 | Clemson (8-0-0) | 9 | 8 | Southern | |
| 8 | 1948-11-22 | 10 | Oregon (9-1-0) | 13 | 3 | PCC | |
| 8 | 1948-11-22 | 11 | Michigan State (6-2-1) | 12 | 1 | 3 | Ind |
| 8 | 1948-11-22 | 12 | Georgia (8-1-0) | 11 | 1 | 1 | SEC |
| 8 | 1948-11-22 | 13 | Minnesota (7-2-0) | 15 | 2 | Western | |
| 8 | 1948-11-22 | 14 | Tulane (8-1-0) | 14 | SEC | ||
| 8 | 1948-11-22 | 15 | Vanderbilt (6-2-1) | SEC | |||
| 8 | 1948-11-22 | 16 | Ole Miss (7-1-0) | 17 | 1 | SEC | |
| 8 | 1948-11-22 | 17 | Ohio State (6-3-0) | 18 | 1 | Western | |
| 8 | 1948-11-22 | 18 | Penn State (6-1-1) | 6 | 12 | Ind | |
| 8 | 1948-11-22 | 19 | Pennsylvania (5-2-0) | 16 | 3 | Ind | |
| 8 | 1948-11-22 | 20 | William & Mary (5-2-2) | Southern | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 7 | 1948-11-15 | 1 | Michigan (8-0-0) | 1 | 130 | Western | |
| 7 | 1948-11-15 | 2 | Notre Dame (8-0-0) | 2 | 27 | Ind | |
| 7 | 1948-11-15 | 3 | Army (8-0-0) | 3 | 3 | Ind | |
| 7 | 1948-11-15 | 4 | California (9-0-0) | 4 | 16 | PCC | |
| 7 | 1948-11-15 | 5 | North Carolina (7-0-1) | 6 | 1 | 11 | Southern |
| 7 | 1948-11-15 | 6 | Penn State (6-0-1) | 5 | 1 | 3 | Ind |
| 7 | 1948-11-15 | 7 | Northwestern (6-2-0) | 8 | 1 | Western | |
| 7 | 1948-11-15 | 8 | Oklahoma (7-1-0) | 9 | 1 | 5 | Big 7 |
| 7 | 1948-11-15 | 9 | Clemson (7-0-0) | 10 | 1 | 9 | Southern |
| 7 | 1948-11-15 | 10 | SMU (7-1-0) | 7 | 3 | SWC | |
| 7 | 1948-11-15 | 11 | Georgia (7-1-0) | 13 | 2 | 2 | SEC |
| 7 | 1948-11-15 | 12 | Michigan State (5-2-1) | 12 | 2 | Ind | |
| 7 | 1948-11-15 | 13 | Oregon (8-1-0) | 15 | 2 | PCC | |
| 7 | 1948-11-15 | 14 | Tulane (7-1-0) | SEC | |||
| 7 | 1948-11-15 | 15 | Minnesota (6-2-0) | 14 | 1 | Western | |
| 7 | 1948-11-15 | 16 | Pennsylvania (5-2-0) | 17 | 1 | Ind | |
| 7 | 1948-11-15 | 17 | Ole Miss (7-1-0) | SEC | |||
| 7 | 1948-11-15 | 18 | Ohio State (6-2-0) | Western | |||
| 7 | 1948-11-15 | 19 | Cornell (7-1-0) | Ind | |||
| 7 | 1948-11-15 | 20 | Georgia Tech (6-2-0) | 11 | 9 | SEC | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 6 | 1948-11-08 | 1 | Michigan (7-0-0) | 2 | 1 | 77 | Western |
| 6 | 1948-11-08 | 2 | Notre Dame (7-0-0) | 1 | 1 | 80 | Ind |
| 6 | 1948-11-08 | 3 | Army (7-0-0) | 4 | 1 | 14 | Ind |
| 6 | 1948-11-08 | 4 | California (8-0-0) | 5 | 1 | 11 | PCC |
| 6 | 1948-11-08 | 5 | Penn State (5-0-1) | 14 | 9 | 1 | Ind |
| 6 | 1948-11-08 | 6 | North Carolina (6-0-1) | 3 | 3 | 7 | Southern |
| 6 | 1948-11-08 | 7 | SMU (6-1-0) | 8 | 1 | SWC | |
| 6 | 1948-11-08 | 8 | Northwestern (6-1-0) | 10 | 2 | Western | |
| 6 | 1948-11-08 | 9 | Oklahoma (6-1-0) | 15 | 6 | 5 | Big 7 |
| 6 | 1948-11-08 | 10 | Clemson (6-0-0) | 12 | 2 | 8 | Southern |
| 6 | 1948-11-08 | 11 | Georgia Tech (6-1-0) | 6 | 5 | SEC | |
| 6 | 1948-11-08 | 12 | Michigan State (4-2-1) | 17 | 5 | 1 | Ind |
| 6 | 1948-11-08 | 13 | Georgia (6-1-0) | 13 | 1 | SEC | |
| 6 | 1948-11-08 | 14 | Minnesota (5-2-0) | 19 | 5 | Western | |
| 6 | 1948-11-08 | 15 | Oregon (7-1-0) | 16 | 1 | PCC | |
| 6 | 1948-11-08 | 16 | Nevada (6-1-0) | 11 | 5 | Ind | |
| 6 | 1948-11-08 | 17 | Pennsylvania (5-1-0) | 7 | 10 | Ind | |
| 6 | 1948-11-08 | 18 | Tennessee (4-2-1) | SEC | |||
| 6 | 1948-11-08 | 19 | Wake Forest (5-2-0) | 18 | 1 | Southern | |
| 6 | 1948-11-08 | 20 | Missouri (5-2-0) | 9 | 11 | Big 7 | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 5 | 1948-11-01 | 1 | Notre Dame (6-0-0) | 2 | 1 | 56 | Ind |
| 5 | 1948-11-01 | 2 | Michigan (6-0-0) | 1 | 1 | 68 | Western |
| 5 | 1948-11-01 | 3 | North Carolina (6-0-0) | 3 | 36 | Southern | |
| 5 | 1948-11-01 | 4 | Army (6-0-0) | 5 | 1 | 5 | Ind |
| 5 | 1948-11-01 | 5 | California (7-0-0) | 4 | 1 | 16 | PCC |
| 5 | 1948-11-01 | 6 | Georgia Tech (6-0-0) | 6 | 7 | SEC | |
| 5 | 1948-11-01 | 7 | Pennsylvania (5-0-0) | 7 | Ind | ||
| 5 | 1948-11-01 | 8 | SMU (5-1-0) | 11 | 3 | 1 | SWC |
| 5 | 1948-11-01 | 9 | Missouri (5-1-0) | 8 | 1 | 4 | Big 7 |
| 5 | 1948-11-01 | 10 | Northwestern (5-1-0) | 9 | 1 | Western | |
| 5 | 1948-11-01 | 11 | Nevada (6-0-0) | 10 | 1 | 5 | Ind |
| 5 | 1948-11-01 | 12 | Clemson (5-0-0) | 13 | 1 | 6 | Southern |
| 5 | 1948-11-01 | 13 | Georgia (5-1-0) | 18 | 5 | SEC | |
| 5 | 1948-11-01 | 14 | Penn State (4-0-1) | 12 | 2 | 1 | Ind |
| 5 | 1948-11-01 | 15 | Oklahoma (5-1-0) | 16 | 1 | 2 | Big 7 |
| 5 | 1948-11-01 | 16 | Oregon (6-1-0) | 14 | 2 | PCC | |
| 5 | 1948-11-01 | 17 | Michigan State (3-2-1) | 17 | Ind | ||
| 5 | 1948-11-01 | 18 | Wake Forest (4-2-0) | Southern | |||
| 5 | 1948-11-01 | 19 | Minnesota (4-2-0) | 15 | 4 | Western | |
| 5 | 1948-11-01 | 20 | Tulane (5-1-0) | 19 | 1 | SEC | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 4 | 1948-10-25 | 1 | Michigan (5-0-0) | 1 | 117 | Western | |
| 4 | 1948-10-25 | 2 | Notre Dame (5-0-0) | 2 | 19 | Ind | |
| 4 | 1948-10-25 | 3 | North Carolina (5-0-0) | 3 | 46 | Southern | |
| 4 | 1948-10-25 | 4 | California (6-0-0) | 4 | 13 | PCC | |
| 4 | 1948-10-25 | 5 | Army (5-0-0) | 5 | 4 | Ind | |
| 4 | 1948-10-25 | 6 | Georgia Tech (5-0-0) | 6 | 1 | SEC | |
| 4 | 1948-10-25 | 7 | Pennsylvania (4-0-0) | 7 | Ind | ||
| 4 | 1948-10-25 | 8 | Missouri (4-1-0) | 9 | 1 | 1 | Big 7 |
| 4 | 1948-10-25 | 9 | Northwestern (4-1-0) | 10 | 1 | Western | |
| 4 | 1948-10-25 | 10 | Nevada (5-0-0) | 15 | 5 | 3 | Ind |
| 4 | 1948-10-25 | 11 | SMU (4-1-0) | 11 | SWC | ||
| 4 | 1948-10-25 | 12 | Penn State (3-0-1) | 8 | 4 | 1 | Ind |
| 4 | 1948-10-25 | 13 | Clemson (4-0-0) | 14 | 1 | Southern | |
| 4 | 1948-10-25 | 14 | Oregon (5-1-0) | PCC | |||
| 4 | 1948-10-25 | 15 | Minnesota (3-2-0) | 13 | 2 | Western | |
| 4 | 1948-10-25 | 16 | Oklahoma (4-1-0) | 18 | 2 | 1 | Big 7 |
| 4 | 1948-10-25 | 17 | Michigan State (2-2-1) | 19 | 2 | Ind | |
| 4 | 1948-10-25 | 18 | Georgia (4-1-0) | SEC | |||
| 4 | 1948-10-25 | 19 | Tulane (4-1-0) | 17 | 2 | SEC | |
| 4 | 1948-10-25 | 20 | Baylor (4-0-1) | SWC | |||
| 4 | 1948-10-25 | 20 | Texas (4-2-0) | SWC | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 3 | 1948-10-18 | 1 | Michigan (4-0-0) | 4 | 3 | 74 | Western |
| 3 | 1948-10-18 | 2 | Notre Dame (4-0-0) | 2 | 23 | Ind | |
| 3 | 1948-10-18 | 3 | North Carolina (4-0-0) | 1 | 2 | 32 | Southern |
| 3 | 1948-10-18 | 4 | California (5-0-0) | 6 | 2 | 14 | PCC |
| 3 | 1948-10-18 | 5 | Army (4-0-0) | 5 | 1 | Ind | |
| 3 | 1948-10-18 | 6 | Georgia Tech (4-0-0) | 7 | 1 | SEC | |
| 3 | 1948-10-18 | 7 | Pennsylvania (3-0-0) | 8 | 1 | Ind | |
| 3 | 1948-10-18 | 8 | Penn State (3-0-0) | 9 | 1 | 1 | Ind |
| 3 | 1948-10-18 | 9 | Missouri (3-1-0) | 12 | 3 | 2 | Big 7 |
| 3 | 1948-10-18 | 10 | Northwestern (3-1-0) | 3 | 7 | Western | |
| 3 | 1948-10-18 | 11 | SMU (3-1-0) | 14 | 3 | SWC | |
| 3 | 1948-10-18 | 12 | Cornell (4-0-0) | 13 | 1 | Ind | |
| 3 | 1948-10-18 | 13 | Minnesota (3-1-0) | 11 | 2 | Western | |
| 3 | 1948-10-18 | 14 | Clemson (3-0-0) | 15 | 1 | Southern | |
| 3 | 1948-10-18 | 15 | Duke (2-0-2) | 18 | 3 | Southern | |
| 3 | 1948-10-18 | 15 | Nevada (4-0-0) | 17 | 2 | 1 | Ind |
| 3 | 1948-10-18 | 17 | Tulane (3-1-0) | SEC | |||
| 3 | 1948-10-18 | 18 | Oklahoma (3-1-0) | 20 | 2 | Big 7 | |
| 3 | 1948-10-18 | 19 | Michigan State (2-2-0) | Ind | |||
| 3 | 1948-10-18 | 20 | Ole Miss (3-1-0) | 10 | 10 | SEC | |
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 2 | 1948-10-11 | 1 | North Carolina (3-0-0) | 2 | 1 | 52 | Southern |
| 2 | 1948-10-11 | 2 | Notre Dame (3-0-0) | 1 | 1 | 34 | Ind |
| 2 | 1948-10-11 | 3 | Northwestern (3-0-0) | 3 | 25 | Western | |
| 2 | 1948-10-11 | 4 | Michigan (3-0-0) | 7 | 3 | 24 | Western |
| 2 | 1948-10-11 | 5 | Army (3-0-0) | 5 | 5 | Ind | |
| 2 | 1948-10-11 | 6 | California (4-0-0) | 9 | 3 | 10 | PCC |
| 2 | 1948-10-11 | 7 | Georgia Tech (3-0-0) | 6 | 1 | SEC | |
| 2 | 1948-10-11 | 8 | Pennsylvania (2-0-0) | 12 | 4 | 7 | Ind |
| 2 | 1948-10-11 | 9 | Penn State (2-0-0) | 10 | 1 | 1 | Ind |
| 2 | 1948-10-11 | 10 | Ole Miss (3-0-0) | 13 | 3 | SEC | |
| 2 | 1948-10-11 | 11 | Minnesota (2-1-0) | 8 | 3 | Western | |
| 2 | 1948-10-11 | 12 | Missouri (2-1-0) | 1 | Big 7 | ||
| 2 | 1948-10-11 | 13 | Cornell (3-0-0) | Ind | |||
| 2 | 1948-10-11 | 14 | SMU (2-1-0) | 4 | 10 | SWC | |
| 2 | 1948-10-11 | 15 | Clemson (3-0-0) | Southern | |||
| 2 | 1948-10-11 | 16 | Georgia (2-1-0) | SEC | |||
| 2 | 1948-10-11 | 17 | Nevada (3-0-0) | 19 | 2 | Ind | |
| 2 | 1948-10-11 | 18 | Duke (1-0-2) | Southern | |||
| 2 | 1948-10-11 | 19 | Baylor (2-0-1) | SWC | |||
| 2 | 1948-10-11 | 20 | Oklahoma (2-1-0) | Big 7 | |||
| Wk | Date | Rk | School | Prev | Chng | 1st | Conf |
| 1 | 1948-10-04 | 1 | Notre Dame (2-0-0) | NA | — | 50 | Ind |
| 1 | 1948-10-04 | 2 | North Carolina (2-0-0) | NA | — | 55 | Southern |
| 1 | 1948-10-04 | 3 | Northwestern (2-0-0) | NA | — | 21 | Western |
| 1 | 1948-10-04 | 4 | SMU (2-0-0) | NA | — | 13 | SWC |
| 1 | 1948-10-04 | 5 | Army (2-0-0) | NA | — | 7 | Ind |
| 1 | 1948-10-04 | 6 | Georgia Tech (2-0-0) | NA | — | SEC | |
| 1 | 1948-10-04 | 7 | Michigan (2-0-0) | NA | — | 2 | Western |
| 1 | 1948-10-04 | 8 | Minnesota (2-0-0) | NA | — | Western | |
| 1 | 1948-10-04 | 9 | California (3-0-0) | NA | — | 3 | PCC |
| 1 | 1948-10-04 | 10 | Penn State (1-0-0) | NA | — | 2 | Ind |
| 1 | 1948-10-04 | 11 | Ohio State (2-0-0) | NA | — | Western | |
| 1 | 1948-10-04 | 12 | Pennsylvania (1-0-0) | NA | — | Ind | |
| 1 | 1948-10-04 | 13 | Arkansas (3-0-0) | NA | — | SWC | |
| 1 | 1948-10-04 | 13 | Ole Miss (2-0-0) | NA | — | SEC | |
| 1 | 1948-10-04 | 15 | Purdue (0-2-0) | NA | — | Western | |
| 1 | 1948-10-04 | 16 | Texas (2-1-0) | NA | — | SWC | |
| 1 | 1948-10-04 | 17 | Indiana (2-0-0) | NA | — | Western | |
| 1 | 1948-10-04 | 18 | Harvard (1-0-0) | NA | — | Ind | |
| 1 | 1948-10-04 | 19 | Nevada (2-0-0) | NA | — | Ind | |
| 1 | 1948-10-04 | 20 | Tennessee (0-1-1) | NA | — | SEC |
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