The 2018 Hungarian Ladies Open was a tennis tournament played on indoor hard courts. It was the 22nd edition of the Hungarian Ladies Open, an International-level tournament on the 2018 WTA Tour.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Slovakia | Dominika Cibulková | 30 | 1 | |
 China | Zhang Shuai | 34 | 2 | |
 Hungary | Tímea Babos | 35 | 3 | |
 Romania | Sorana Cîrstea | 38 | 4 | |
| Romania | Mihaela Buzărnescu | 43 | 5 | |
 Belarus | Aliaksandra Sasnovich | 46 | 6 | |
 Serbia | Aleksandra Krunić | 47 | 7 | |
| Donna Vekić | 50 | 8 |
The following players received wildcards into the main draw:
The following player received entry using a protected ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Océane Dodin
Kateryna Kozlova
Margarita Gasparyan → replaced by Pauline Parmentier
Magda Linette → replaced by Monica Niculescu
Kristýna Plíšková → replaced by Viktória Kužmová Magdaléna Rybáriková → replaced by 
Lara Arruabarrena| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Belgium | Kirsten Flipkens |  Sweden | Johanna Larsson | 71 | 1 | |
 United Kingdom | Anna Smith | Czech Republic | Renata Voráčová | 82 | 2 | |
| Russian Federation | Natela Dzalamidze |  Georgia | Oksana Kalashnikova | 127 | 3 | |
| Lesley Kerkhove | Belarus | Lidziya Marozava | 128 | 4 |
The following pairs received wildcards into the doubles main draw:
See main article: 2018 Hungarian Ladies Open – Singles.
Alison Van Uytvanck def. Dominika Cibulková, 6–3, 3–6, 7–5[1]See main article: 2018 Hungarian Ladies Open – Doubles.
Georgina García Pérez / Fanny Stollár def. Kirsten Flipkens / Johanna Larsson, 4–6, 6–4, [10–3]
