| Doubles | |
|---|---|
| 2018 Korea Open | |
| Champions |  Choi Ji-hee Han Na-lae |
| Runners-up |  Hsieh Shu-ying Hsieh Su-wei |
| Final score | 6–3, 6–2 |
Kiki Bertens and Johanna Larsson were the defending champions, but Bertens chose not to participate. Larsson played alongside Mona Barthel, but lost in the semifinals to Hsieh Shu-ying and Hsieh Su-wei.
Choi Ji-hee and Han Na-lae won the title, defeating Hsieh and Hsieh in the final, 6–3, 6–2.
Irina-Camelia Begu / Raluca Olaru (quarterfinals)
Dalila Jakupović / 
Darija Jurak (quarterfinals)
Ellen Perez / Arina Rodionova (semifinals)
Mona Barthel / 
Johanna Larsson (semifinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | I-C Begu R Olaru | 6 | 77 | ||||||||||||||||||||||||
 J Cako N Geuer | 4 | 65 | 1 | I-C Begu R Olaru | 6 | 1 | [8] | ||||||||||||||||||||
| S-y Hsieh S-w Hsieh | 6 | 6 | S-y Hsieh S-w Hsieh | 3 | 6 | [10] | |||||||||||||||||||||
 AK Schmiedlová T Zidanšek | 4 | 4 | S-y Hsieh S-w Hsieh | 3 | 6 | [12] | |||||||||||||||||||||
| 4 | M Barthel J Larsson | 6 | 77 | 4 | M Barthel J Larsson | 6 | 1 | [10] | |||||||||||||||||||
C Škamlová  E Wacanno | 4 | 65 | 4 | M Barthel J Larsson | 77 | 3 | [10] | ||||||||||||||||||||
| WC | S-j Jang N-r Kim | 2 | 64 |  L Kumkhum P Plipuech | 64 | 6 | [8] | ||||||||||||||||||||
| L Kumkhum P Plipuech | 6 | 77 | S-y Hsieh S-w Hsieh | 3 | 2 | ||||||||||||||||||||||
 H Dart B Schoofs | 5 | 1 | WC | J-h Choi N-l Han | 6 | 6 | |||||||||||||||||||||
 B Štefková R Voráčová | 7 | 6 | B Štefková R Voráčová | 0 | 4 | ||||||||||||||||||||||
 C Liang Q Ye | 4 | 1 | 3 | E Perez Ar Rodionova | 6 | 6 | |||||||||||||||||||||
| 3 | E Perez Ar Rodionova | 6 | 6 | 3 | E Perez Ar Rodionova | 1 | 1 | ||||||||||||||||||||
P Hon  Y Sizikova | 3 | 77 | [4] | WC | J-h Choi N-l Han | 6 | 6 | ||||||||||||||||||||
| WC | J-h Choi N-l Han | 6 | 62 | [10] | WC | J-h Choi N-l Han | 7 | 4 | [10] | ||||||||||||||||||
A Rus  N Stojanović | 0r | 2 | D Jakupović D Jurak | 5 | 6 | [5] | |||||||||||||||||||||
| 2 | D Jakupović D Jurak | 2 | |||||||||||||||||||||||||
Mathilde Johansson was the defending champion, and successfully defended her title, defeating Petra Cetkovská in the final, 7–5, 6–3.
Caroline Wozniacki was the defending champion, but lost to Angelique Kerber 6–4, 6–4 in the final.
Garbiñe Muguruza was the defending champion heading into the tournament but chose to compete at the Sydney tennis event instead of Hobart. In the final, it was unseeded Brit Heather Watson who defeated the American qualifier in Madison Brengle, 6–3, 6–4 to record her second WTA title.
Lara Arruabarrena and Irina-Camelia Begu were the defending champions but chose not to participate together. Begu teamed up with Raluca Olaru but lost in the semifinals to Kiki Bertens and Johanna Larsson.
Arruabarrena successfully defended the title alongside Andreja Klepač, defeating Kiki Bertens and Johanna Larsson in the final, 2–6, 6–3, [10–6].
Timea Bacsinszky and Kristina Barrois were the defeating champions, but chose not to participate this year.
Heather Watson was the defending champion, but lost in the quarterfinals to Johanna Larsson.
Kiki Bertens and Johanna Larsson were the defending champions, but withdrew from their semifinal match.
Han Xinyun and Christina McHale won the title, defeating Kimberly Birrell and Jarmila Wolfe in the final, 6–3, 6–0.
Maria Sharapova was the defending champion, but could not defend the title because of her provisional suspension after failing a drug test at the Australian Open.
This is the first edition of the tournament since 1994.
Mona Barthel and Laura Siegemund were the defending champions, but Barthel chose not to participate this year. Siegemund played alongside Antonia Lottner, but lost in the first round to Annika Beck and Xenia Knoll.
Elise Mertens and An-Sophie Mestach were the defending champions, but Mestach chose not to participate this year and Mertens chose to compete in Brisbane instead.
Serena Williams was the defending champion, but did not participate this year due to pregnancy.
Viktorija Golubic was the defending champion, but lost in the first round to Antonia Lottner.
Bethanie Mattek-Sands and Lucie Šafářová were the defending champions, but Mattek-Sands was unable to compete due to injury. Šafářová played alongside Barbora Strýcová, but lost in the semifinals to Lucie Hradecká and Kateřina Siniaková.
Agnieszka Radwańska was the defending champion, but lost in the semifinals to Daria Gavrilova.
Kirsten Flipkens and Johanna Larsson were the defending champions, but Flipkens chose not to participate this year.
Ekaterina Makarova and Elena Vesnina were the defending champions, but lost in the semifinals to Kiki Bertens and Johanna Larsson.
Latisha Chan and Martina Hingis were the defending champions, but Hingis retired from professional tennis at the end of 2017. Chan played alongside her sister Chan Hao-ching, but lost in the second round to Hsieh Su-wei and Barbora Strýcová.
Simona Halep was the two-time defending champion, but lost to Karolína Plíšková in the quarterfinals.
Jeļena Ostapenko was the defending champion, but lost in the second round to Ekaterina Alexandrova.