The 1998 Heineken Trophy was a tennis tournament played on grass courts in Rosmalen, 's-Hertogenbosch in the Netherlands that was part of the International Series of the 1998 ATP Tour and of Tier III of the 1998 WTA Tour. The tournament was held from 15 June through 21 June 1998. Patrick Rafter and Julie Halard-Decugis won the singles titles.
| 1998 Heineken Trophy | |
|---|---|
| Date | 15–21 June |
| Edition | 9th (men) / 3rd (women) |
| Surface | Grass / outdoor |
| Location | Rosmalen, 's-Hertogenbosch, Netherlands |
| Champions | |
| Men's singles | |
 Patrick Rafter[1] | |
| Women's singles | |
 Julie Halard-Decugis | |
| Men's doubles | |
Guillaume Raoux /  Jan Siemerink[2] | |
| Women's doubles | |
 Sabine Appelmans / Miriam Oremans | |
Finals
editMen's singles
edit Patrick Rafter defeated 
Martin Damm 7–6(7–2), 6–2
- It was Rafter's 3rd title of the year and the 10th of his career.
Women's singles
edit Julie Halard-Decugis defeated Miriam Oremans 6–3, 6–4
- It was Halard-Decugis' 2nd title of the year and the 11th of her career.
Men's doubles
edit Guillaume Raoux / Jan Siemerink defeated Joshua Eagle / Andrew Florent 7–6(7–5), 6–2
- It was Raoux's only title of the year and the 5th of his career. It was Siemerink's 2nd title of the year and the 12th of his career.
Women's doubles
edit Sabine Appelmans / Miriam Oremans defeated 
Cătălina Cristea / Eva Melicharová 6–7(4–7), 7–6(8–6), 7–6(7–5)
- It was Appelmans' 2nd title of the year and the 10th of her career. It was Oremans' 2nd title of the year and the 3rd of her career.