1999 Pan Pacific Swimming Championships – Men's 100 metre freestyle
The men's 100 metre freestyle competition at the 1999 Pan Pacific Swimming Championships took place on August 25–26 at the Sydney International Aquatic Centre. The last champion was Michael Klim of Australia.
This race consisted of two lengths of the pool, both lengths being in freestyle.
Records
Prior to this competition, the existing world and Pan Pacific records were as follows:| World record | 48.21 | Monte Carlo, Monaco | June 18, 1994 | |
| Pan Pacific Championships record | 49.17 | Tokyo, Japan | August 16, 1985 |
Results
All times are in minutes and seconds.| KEY: | q | Fastest non-qualifiers | Q | Qualified | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |
Heats
The first round was held on August 25.| Rank | Name | Nationality | Time | Notes |
| 1 | Michael Klim | 49.39 | Q | |
| 2 | Neil Walker | 49.97 | Q | |
| 3 | Chris Fydler | 50.08 | Q | |
| 4 | Jason Lezak | 50.10 | Q | |
| 5 | Ian Thorpe | 50.11 | Q | |
| 6 | Brock Newman | 50.14 | Q | |
| 7 | Jeffrey English | 50.21 | Q | |
| 8 | Bryan Jones | 50.24 | Q | |
| 9 | Yannick Lupien | 50.54 | Q | |
| 10 | Todd Pearson | 50.57 | Q | |
| 11 | Dod Wales | 50.61 | Q | |
| 12 | Raymond Hass | 50.62 | Q | |
| 13 | Jay Schryver | 50.82 | Q | |
| 14 | Shunsuke Ito | 50.86 | Q | |
| 15 | Brad Schumacher | 50.95 | Q | |
| 16 | Joseph Marus | 50.98 | Q | |
| 17 | Salim Iles | 51.17 | ||
| 18 | Nicholas Folker | 51.22 | ||
| 19 | Ian Crocker | 51.23 | ||
| 20 | Geoff Huegill | 51.51 | ||
| 21 | Nathan Rickard | 51.52 | ||
| 22 | Craig Hutchison | 51.54 | ||
| 23 | Mike Mintenko | 51.65 | ||
| 24 | Graham Duthie | 51.93 | ||
| 25 | Greg Main-Baillie | 51.97 | ||
| 26 | Jake Steele | 52.03 | ||
| 27 | Tomohiro Yamanoi | 52.11 | ||
| 27 | Mark Johnston | 52.11 | ||
| 29 | Nicholas Sheeran | 52.21 | ||
| 30 | Rick Say | 52.37 | ||
| 30 | Brad Herring | 52.37 | ||
| 32 | Brian Johns | 52.43 | ||
| 33 | Scott Rice | 52.63 | ||
| 34 | Carl Probert | 52.99 | ||
| 35 | Adam Sioui | 53.20 | ||
| 36 | Ryo Takayasu | 53.39 | ||
| 37 | Wing Fu | 53.46 | ||
| 38 | Gentle Offoin | 53.71 | ||
| 39 | Mark Thompson | 53.73 | ||
| 40 | Colin Sood | 53.86 |
Semifinals
The semifinals were held on August 25.| Rank | Name | Nationality | Time | Notes |
| 1 | Michael Klim | 48.81 | Q, CR | |
| 2 | Chris Fydler | 49.62 | Q | |
| 3 | Neil Walker | 49.70 | Q | |
| 4 | Ian Thorpe | 49.71 | Q | |
| 5 | Brock Newman | 49.94 | Q | |
| 6 | Jason Lezak | 50.11 | Q | |
| 7 | Bryan Jones | 50.23 | Q | |
| 8 | Jeffrey English | 50.40 | Q | |
| 9 | Yannick Lupien | 50.47 | ||
| 10 | Nicholas Folker | 50.72 | ||
| 11 | Shunsuke Ito | 50.90 | ||
| 12 | Salim Iles | 51.47 | ||
| 13 | Mike Mintenko | 51.69 | ||
| 14 | Graham Duthie | 51.75 | ||
| 15 | Greg Main-Baillie | 51.76 | ||
| 16 | Craig Hutchison | 51.87 |
Final
The final was held on August 26.| Rank | Lane | Nationality | Time | Notes |
| Michael Klim | 48.98 | |||
| Neil Walker | 49.17 | |||
| Chris Fydler | 49.42 | |||
| 4 | Yannick Lupien | 49.94 | NR | |
| 5 | Nicholas Folker | 50.36 | ||
| 6 | Salim Iles | 51.09 | ||
| 7 | Shunsuke Ito | 51.30 | ||
| 8 | Brock Newman | 51.85 |