| Doubles | |
|---|---|
| 2018 Korea Open | |
| Champions |  Choi Ji-hee Han Na-lae |
| Runners-up |  Hsieh Shu-ying Hsieh Su-wei |
| Score | 6–3, 6–2 |
| Draw | 16 |
| Seeds | 4 |
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. [1]
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.
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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.
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