| Rank | Student | School | Years | | FTM | FTA | FT% |
| 1 | Darin Banner | Eldon | 1986-1990 | | 285 | 316 | 90.2% |
| 2 | Blake Aheam | DeSmet | 2000-2003 | | 289 | 328 | 88.1% |
| 3 | David Coutchie | Seymour | 1997-2000 | | 444 | 505 | 87.9% |
| 4 | Brett Hale | Dexter | 1999-2001 | | 426 | 495 | 86.1% |
| 5 | Jeff Gladbach | Northwestern (Mendon) | 1989-1992 | | 256 | 298 | 85.9% |
| 6 | Patrick Youmans | Elsberry | 1999-2002 | | 315 | 367 | 85.8% |
| 7 | Kramer Soderberg | St. Charles West | 2005-2008 | | 670 | 784 | 85.5% |
| 8 | Ryan Bandermann | Woodland | 2000-2001 | | 207 | 244 | 84.8% |
| 9 | Nathan Conner | Bloomfield | 1995-1997 | | 311 | 368 | 84.5% |
| 10 | Luke Meyer | St. Francis Borgia | 2001-2004 | | 468 | 556 | 84.2% |
| 11 | Carter Trumbore | Butler | 2020-2023 | | 679 | 809 | 83.9% |
| 12 | Brett Ledbetter | Warren County High School | 2001-2003 | | 406 | 485 | 83.7% |
| 13 | Drenin Dinkins | South Iron | 2018-2021 | | 532 | 640 | 83.1% |