| 100 Backstroke | ||||||
| State Record: :51.11 National Record: :47.50 All-American Automatic: :51.29 All-American Consideration: :53.85 1998 Qualifying Time: :59.79 | ||||||
| Rank | Last Name | First Name | GR | School | Time | Date |
| 1 | FERGUSON | ZACH | 11 | WDM DOWLING | 0:53.81 | 12/12/98 |
| 2 | GEVOCK | JOE | 11 | OTTUMWA | 0:54.73 | 12/10/98 |
| 3 | BOCKES | SETH | 12 | CEDAR FALLS | 0:55.03 | 12/12/98 |
| 4 | LUEBKE | TYLER | 11 | IOWA CITY | 0:56.29 | 12/17/98 |
| 5 | RENNER-ARJES | IAN | 12 | BETTENDORF | 0:56.30 | 12/17/98 |
| 6 | NICKELL | B.J. | 11 | CR KENNEDY | 0:57.60 | 12/16/98 |
| 7 | BILLUPS | NATE | 10 | BETTENDORF | 0:58.15 | 12/5/98 |
| 8 | HACKNEY | CODY | 10 | CR KENNEDY | 0:58.21 | 12/15/98 |
| 9 | COAD | MATT | 12 | SC METRO | 0:58.48 | 12/15/98 |
| 10 | PETERSON | SEAN | 11 | LEWIS CENTRAL | 0:58.80 | 12/5/98 |
| 11 | JENSEN | BLAKE | 10 | LEWIS CENTRAL | 0:58.81 | 12/10/98 |
| 12 | LANDHERR | JEFF | 10 | LINN-MAR | 0:58.83 | 12/10/98 |
| 13 | HAMMOND | TIM | 12 | GRINNELL | 0:59.16 | 12/1/98 |
| 14 | BRENT | B.J. | 12 | ANKENY | 0:59.34 | 12/3/98 |
| 15 | BORRETT | BLAKE | 11 | CR JEFFERSON | 0:59.48 | 12/12/98 |
| 16 | DOUGLAS | ADAM | 10 | WDM VALLEY | 1:00.29 | 12/10/98 |
| 17 | DANTE | MARK | 12 | DM HOOVER | 1:00.30 | 12/5/98 |
| 18 | MC DUFF | MATT | 11 | AMES | 1:00.45 | 12/17/98 |
| 19 | DUFFY | DEREK | 9 | MASON CITY | 1:00.72 | 12/1/98 |
| 20 | OBERHOFFER | CHRIS | 12 | DBQ SENIOR | 1:00.76 | 12/5/98 |
| 21 | STANIGER | STEVE | 11 | CEDAR FALLS | 1:01.31 | 12/16/98 |
| 22 | LEAR | AARON | 12 | MUSCATINE | 1:01.48 | 12/19/98 |
| 23 | JANES | GREG | 12 | CR WASHINGTON | 1:01.86 | 12/17/98 |
| 24 | NORING | JASON | 12 | CEDAR FALLS | 1:01.98 | 12/10/98 |
| 25 | LANE | COLLIN | 10 | MUSCATINE | 1:02.01 | 12/19/98 |
| 26 | WOOD | JOHNNY | 9 | WDM VALLEY | 1:02.11 | 12/15/98 |
| 27 | WOLF | RICHARD | 10 | WDM VALLEY | 1:02.16 | 12/15/98 |
| 28 | COLLINS | MATT | 9 | MUSCATINE | 1:02.20 | 12/10/98 |
| 29 | KOLFENBACH | JOE | 11 | DBQ HEMPSTEAD | 1:02.31 | 12/15/98 |
| 30 | BASTRON | ALEX | 11 | OTTUMWA | 1:02.34 | 12/17/98 |
| 31 | POINDEXTER | GAVIN | 12 | CR KENNEDY | 1:02.37 | 1/216/98 |
| 32 | MITCHELL | ADAM | 9 | WDM DOWLING | 1:02.38 | 12/8/98 |
| 33 | SMITH | IAN | 10 | CR WASHINGTON | 1:02.44 | 12/17/98 |
| 34 | UMPHRESS | MATT | 11 | WDM VALLEY | 1:02.65 | 12/15/98 |
| 35 | DRISCOLL | BEN | 11 | CF-NU HIGH | 1:02.66 | 12/12/98 |
| 36 | SAWYER | RYAN | 11 | MASON CITY | 1:02.88 | 12/1/98 |
| 37 | ABRAM | ALAN | 11 | WDM VALLEY | 1:03.09 | 12/8/98 |
| 38 | SAXTON | JON | 9 | AMES | 1:03.37 | 12/5/98 |
| 39 | BRIGGS | DUSTIN | 11 | BOONE | 1:03.57 | 12/17/98 |
| 40 | MC ANALLY | RYAN | 10 | BETTENDORF | 1:03.79 | 12/10/98 |
| 41 | SIMOENS | RYAN | 12 | CR JEFFERSON | 1:03.96 | 12/12/98 |
| 42 | SOGGE | MIKE | 10 | MARSHALLTOWN | 1:04.02 | 12/3/98 |
| 43 | GANTENBEIN | JACOB | 10 | DBQ SENIOR | 1:04.16 | 12/19/98 |
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