Il Torneo di pallacanestro maschile NCAA Division I 1998 si concluse con la vittoria di Kentucky contro Utah.
Jeff Sheppard di Kentucky fu nominato Most Outstanding Player.
| Ottavi di finale | | | Quarti di finale | | | Sweet Sixteen | | | Elite Eight | |
| | | | | | | | | | | | | | | | | | | |
| 1 | North Carolina | 88 | | | | |
|
| 16 | Navy | 52 | |
| | 1 | North Carolina | 93 | |
| | |
| | | 8 | Charlotte | 83* | |
| 8 | Charlotte | 77 | |
| |
| 9 | UIC | 62 | |
| | 1 | North Carolina | 73 | |
| | |
| | | 4 | Michigan St | 58 | |
| 5 | Princeton | 69 | | |
| |
| 12 | UNLV | 57 | |
| | 5 | Princeton | 56 | |
| | |
| | | 4 | Michigan St | 63 | |
| 4 | Michigan St | 83 | |
| |
| 13 | Eastern Michigan | 71 | |
| | 1 | North Carolina | 75 | |
| | |
| | | 2 | Connecticut | 64 | |
| 6 | Xavier | 68 | | | |
| |
| 11 | Washington | 69 | |
| | 11 | Washington | 81 | |
| | |
| | | 14 | Richmond | 66 | |
| 3 | South Carolina | 61 | |
| |
| 14 | Richmond | 62 | |
| | 11 | Washington | 74 | |
| | |
| | | 2 | Connecticut | 75 | |
| 7 | Indiana | 94 | | |
| |
| 10 | Oklahoma | 87* | |
| | 7 | Indiana | 68 | |
| | |
| | | 2 | Connecticut | 78 | |
| 2 | Connecticut | 93 | |
| |
| 15 | Fairleigh Dickinson | 85 | |
| Ottavi di finale | | | Quarti di finale | | | Sweet Sixteen | | | Elite Eight | |
| | | | | | | | | | | | | | | | | | | |
| 1 | Duke | 99 | | | | |
|
| 16 | Radford | 63 | |
| | 1 | Duke | 79 | |
| | |
| | | 8 | Oklahoma St. | 73 | |
| 8 | Oklahoma St. | 74 | |
| |
| 9 | George Washington | 59 | |
| | 1 | Duke | 80 | |
| | |
| | | 5 | Syracuse | 67 | |
| 5 | Syracuse | 63 | | |
| |
| 12 | Iona | 61 | |
| | 5 | Syracuse | 56 | |
| | |
| | | 4 | New Mexico | 46 | |
| 4 | New Mexico | 79 | |
| |
| 13 | Butler | 62 | |
| | 1 | Duke | 84 | |
| | |
| | | 2 | Kentucky | 86 | |
| 6 | UCLA | 65 | | | |
| |
| 11 | Miami-FL | 62 | |
| | 6 | UCLA | 85 | |
| | |
| | | 3 | Michigan | 82 | |
| 3 | Michigan | 80 | |
| |
| 14 | Davidson | 61 | |
| | 6 | UCLA | 68 | |
| | |
| | | 2 | Kentucky | 94 | |
| 7 | Massachusetts | 46 | | |
| |
| 10 | St. Louis | 51 | |
| | 10 | St. Louis | 61 | |
| | |
| | | 2 | Kentucky | 88 | |
| 2 | Kentucky | 82 | |
| |
| 15 | South Carolina St. | 67 | |
| Ottavi di finale | | | Quarti di finale | | | Sweet Sixteen | | | Elite Eight | |
| | | | | | | | | | | | | | | | | | | |
| 1 | Kansas | 110 | | | | |
|
| 16 | Prairie View | 52 | |
| | 1 | Kansas | 75 | |
| | |
| | | 8 | Rhode Island | 80 | |
| 8 | Rhode Island | 97 | |
| |
| 9 | Murray St | 74 | |
| | 8 | Rhode Island | 74 | |
| | |
| | | 13 | Valparaiso | 68 | |
| 5 | TCU | 87 | | |
| |
| 12 | Florida St | 96 | |
| | 12 | Florida St | 77 | |
| | |
| | | 13 | Valparaiso | 83 | |
| 4 | Mississippi | 69 | |
| |
| 13 | Valparaiso | 70 | |
| | 8 | Rhode Island | 77 | |
| | |
| | | 3 | Stanford | 79 | |
| 6 | Clemson | 72 | | | |
| |
| 11 | Western Michigan | 75 | |
| | 11 | Western Michigan | 65 | |
| | |
| | | 3 | Stanford | 83 | |
| 3 | Stanford | 67 | |
| |
| 14 | College of Charleston | 57 | |
| | 3 | Stanford | 67 | |
| | |
| | | 2 | Purdue | 59 | |
| 7 | St Johns | 64 | | |
| |
| 10 | Detroit | 66 | |
| | 10 | Detroit | 65 | |
| | |
| | | 2 | Purdue | 80 | |
| 2 | Purdue | 95 | |
| |
| 15 | Delaware | 56 | |
| Ottavi di finale | | | Quarti di finale | | | Sweet Sixteen | | | Elite Eight | |
| | | | | | | | | | | | | | | | | | | |
| 1 | Arizona | 99 | | | | |
|
| 16 | Nicholls St | 60 | |
| | 1 | Arizona | 82 | |
| | |
| | | 9 | Illinois St | 49 | |
| 8 | Tennessee | 81 | |
| |
| 9 | Illinois St | 82* | |
| | 1 | Arizona | 87 | |
| | |
| | | 4 | Maryland | 79 | |
| 5 | Illinois | 64 | | |
| |
| 12 | South Alabama | 51 | |
| | 5 | Illinois | 61 | |
| | |
| | | 4 | Maryland | 67 | |
| 4 | Maryland | 82 | |
| |
| 13 | Utah St | 68 | |
| | 1 | Arizona | 51 | |
| | |
| | | 3 | Utah | 76 | |
| 6 | Arkansas | 74 | | | |
| |
| 11 | Nebraska | 65 | |
| | 6 | Arkansas | 69 | |
| | |
| | | 3 | Utah | 75 | |
| 3 | Utah | 85 | |
| |
| 14 | San Francisco | 68 | |
| | 3 | Utah | 65 | |
| | |
| | | 10 | West Virginia | 62 | |
| 7 | Temple | 52 | | |
| |
| 10 | West Virginia | 82 | |
| | 10 | West Virginia | 75 | |
| | |
| | | 2 | Cincinnati | 74 | |
| 2 | Cincinnati | 65 | |
| |
| 15 | Northern Arizona | 62 | |
| Semifinali nazionali | | | Finale nazionale | |
| | | | | | | | | |
| 1 | North Carolina | 59 | | |
|
| W3 | Utah | 65 | |
| | W3 | Utah | 69 | |
| | |
| | | S2 | Kentucky | 78 | |
| S2 | Kentucky | 86 | |
| |
| M3 | Stanford | 85 | |
- Allenatore: Tubby Smith
- Vice-allenatori: Mike Sutton, George Felton