See main article: 1998 Australian Men's Hardcourt Championships. Todd Woodbridge was the defending champion, but lost to Jason Stoltenberg in the semifinals.
Sixteen-year old wild card and Adelaide native Lleyton Hewitt won his first ATP title defeated Stoltenberg in the final, 3–6, 6–3, 7–6(7–4). Stoltenberg would go on to coach Hewitt, beginning in 2001.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.