| 2018 The Hague Open | |
|---|---|
| Date | 16–22 July |
| Edition | 26th |
| Surface | Clay |
| Location | Scheveningen, Netherlands |
| Champions | |
| Singles | |
 Thiemo de Bakker | |
| Doubles | |
 Ruben Gonzales /  Nathaniel Lammons | |
The 2018 The Hague Open was a professional tennis tournament played on clay courts. It was the 26th edition of The Hague Open and was part of the 2018 ATP Challenger Tour. It took place in Scheveningen, Netherlands between 16 and 22 July 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 GER | Yannick Maden | 134 | 1 |
 CZE | Adam Pavlásek | 145 | 2 |
| GER | Mats Moraing | 156 | 3 |
| GER | Oscar Otte | 166 | 4 |
 ITA | Matteo Donati | 176 | 5 |
 ARG | |||
 HUN | Attila Balázs | 182 | 7 |
 FRA | Grégoire Barrère | 188 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Jeremy Jahn Marvin Netuschil Thiemo de Bakker def. Yannick Maden 6–2, 6–1. Ruben Gonzales / Nathaniel Lammons def. 
Luis David Martínez / 
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