| 1978 Dutch Open | |
|---|---|
| Date | 24–30 July |
| Edition | 21st |
| Category | Grand Prix |
| Draw | 32S / 16D |
| Prize money | $75,000 |
| Surface | Clay / outdoor |
| Location | Hilversum, Netherlands |
| Venue | 't Melkhuisje |
| Champions | |
| Singles | |
 Balázs Taróczy[1] | |
| Doubles | |
 Tom Okker / Balázs Taróczy[2] | |
The 1978 Dutch Open was a Grand Prix men's tennis tournament staged in Hilversum, Netherlands. The tournament was played on outdoor clay courts and was held from 24 July until 30 July 1978. It was the 21st edition of the tournament. Third-seeded Balázs Taróczy won the singles title, his second at the event after 1976.
- ^ "1978 Hilversum – Singles draw". Association of Tennis Professionals (ATP).
- ^ "1978 Hilversum – Doubles draw". Association of Tennis Professionals (ATP).