| Date: | 5–11 February |
| Edition: | 3rd |
| Location: | Budapest, Hungary |
| Champs: |  Vasek Pospisil |
| Champd: | Félix Auger-Aliassime /  Nicola Kuhn |
The 2018 Hungarian Challenger Open was a professional tennis tournament played on indoor hard courts. It was the third edition of the tournament and was a part of the 2018 ATP Challenger Tour. It took place in Budapest, Hungary between 5 and 11 February 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Hungary | Márton Fucsovics | 63 | 1 | |
| Canada | Vasek Pospisil | 85 | 2 | |
 France | Quentin Halys | 119 | 3 | |
 Sweden | Elias Ymer | 135 | 4 | |
| Canada | Félix Auger-Aliassime | 163 | 5 | |
 Estonia | Jürgen Zopp | 171 | 6 | |
| Viktor Galović | 181 | 7 | ||
 Serbia | Nikola Milojević | 183 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Constant Lestienne
Andrea PellegrinoSee main article: 2018 Hungarian Challenger Open – Singles.
Vasek Pospisil def. Nicola Kuhn 7–6(7–3), 3–6, 6–3.See main article: 2018 Hungarian Challenger Open – Doubles.
Félix Auger-Aliassime / Nicola Kuhn def. Marin Draganja / Tomislav Draganja 2–6, 6–2, [11–9].