1999 Australian Open – Mixed Doubles

The 1999 Australian Open – Mixed Doubles was the mixed doubles event of the eighty-seventh edition of the Australian Open, the first Grand Slam of the year. Venus Williams and Justin Gimelstob were the defending champions but did not compete that year.

Mariaan de Swardt and David Adams won in the final 6–4, 4–6, 7–6^(7–5), against Serena Williams and Max Mirnyi.

One of the surprises of this tournament was that over half of the seeds fell in the first round, and none of the seeds made it past the second round.