| 1999 Sydney International | |
|---|---|
| Date | 11–16 January |
| Edition | 107th |
| Category | International Series Tier II |
| Surface | Hard / outdoor |
| Location | Sydney, Australia |
| Venue | White City Stadium |
| Champions | |
| Men's singles | |
 Todd Martin | |
| Women's singles | |
| Lindsay Davenport | |
| Men's doubles | |
 Sébastien Lareau / Daniel Nestor | |
| Women's doubles | |
 Elena Likhovtseva /  Ai Sugiyama | |
The 1999 Sydney International was a tennis tournament played on outdoor hard courts at the White City Stadium in Sydney in Australia that was part of the International Series of the 1999 ATP Tour and of Tier II of the 1999 WTA Tour. The tournament was held from 11 through 16 January 1999.