| 1997-98 NISCA BOYS ZONE 4 - 500 YARD FREESTYLE TOP 16 | |||
| Place | Name | School | Time |
| 1st | Jason Mallory | Penn, IN (2) | 4:26.25 |
| 2nd | Jeff Moors | Brother Rice, MI (5) | 4:30.95 |
| 3rd | Tim Barry | Oak Park - River Forest, IL (3) | 4:33.65 |
| 4th | Steve Mohr | Homestead, WI (4) | 4:34.50 |
| 5th | Heath Montgomery | Hanover Central, IN | 4:34.95 |
| 6th | Ray Cubberly | Ann Arbor Pioneer, MI | 4:35.67 |
| 7th | Paul Valen | Muskego, WI | 4:37.65 |
| 8th | Randy Lam | University of Detroit Jesuit, MI | 4:38.70 |
| 9th | Nick Toumanoff | Arrowhead, WI | 4:38.89 |
| 10th | Jason Sider | Valley, IA (2) | 4:39.21 |
| 11th | Tom Lockman | Champaign Central, IL | 4:39.21 |
| 12th | Matt Maulding | Waubonsie Valley, IL | 4:39.33 |
| 13th | Peter Clark | Whitefish Bay, WI | 4:40.11 |
| 14th | Matt Kowalski | Brother Rice, MI | 4:40.20 |
| 15th | Chris George | Ankeny, IA | 4:40.29 |
| 16th | Josh Smith | Bay City Western, MI | 4:40.63 |
| 1997-98 NISCA GIRLS ZONE 4 - 500 YARD FREESTYLE TOP 16 | |||
| Place | Name | School | Time |
| 1st | Kathleen Fields | Columbus North, IN (5) | 4:50.00 |
| 2nd | Rebecca Wilson | Homestead, IN | 4:51.51 |
| 3rd | Amy Migawa | Driscoll Catholic, IL (3) | 4:54.25 |
| 4th | Courtney Piper | Gross Pointe North, MI (5) | 4:56.23 |
| 5th | Melissa Loehndorf | Germantown, WI (2) | 4:57.78 |
| 6th | Hillary Mason | Cedar Falls, IA (1) | 4:59.60 |
| 7th | Katie Seall | Carmel, IN | 4:59.72 |
| 8th | Casey Nicholson | Ann Arbor Pioneer, MI | 4:59.73 |
| 9th | Erin Gorlesky | Fort Wayne Snider, IN | 5:00.60 |
| 10th | Brooke Taflinger | Kokomo, IN | 5:00.91 |
| 11th | Sarah Fraumann | Deerfield, IL | 5:01.66 |
| 12th | Carly Piper | Gross Pointe North, MI | 5:01.93 |
| 13th | Amy McCullough | Mercy, MI | 5:02.07 |
| 14th | Erika Vohnout | St. Charles, IL | 5:02.16 |
| 15th | Catey Gradford | Portage Northern, MI | 5:02.32 |
| 16th | Katie Scholl | Germantown, WI | 5:02.90 |