| Women's singles | |
|---|---|
| 2018 Darwin Tennis International | |
| Champion |  Kimberly Birrell |
| Runner-up | Ellen Perez |
| Final score | 6–3, 6–3 |
Casey Dellacqua was the defending champion having won the previous edition in 2011, however she had retired from professional tennis in April 2018.
Kimberly Birrell won the title, defeating Ellen Perez in an all-Australian final, 6–3, 6–3.
Olivia Rogowska (quarterfinals) Arina Rodionova (first round) Priscilla Hon (withdrew) Jaimee Fourlis (first round)
Jang Su-jeong (first round)
Katy Dunne (first round)
Eri Hozumi (first round) Destanee Aiava (second round)| Semifinals | Final | ||||||||||||
| Kimberly Birrell | 6 | 2 | |||||||||||
| Q |  Zuzana Zlochová | 4 | 1r | ||||||||||
| Kimberly Birrell | 6 | 6 | |||||||||||
| Ellen Perez | 3 | 3 | |||||||||||
| Ellen Perez | 6 | 6 | |||||||||||
| WC | Naiktha Bains | 2 | 3 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | O Rogowska | 6 | 6 | ||||||||||||||||||||||||
| WC | O Tjandramulia | 4 | 1 | 1 | O Rogowska | 6 | 6 | ||||||||||||||||||||
 G Brescia | 77 | 77 | G Brescia | 3 | 2 | ||||||||||||||||||||||
| M Minokoshi | 62 | 64 | 1 | O Rogowska | 66 | 3 | |||||||||||||||||||||
| K Birrell | 6 | 6 | K Birrell | 78 | 6 | ||||||||||||||||||||||
| R Ozaki | 4 | 1 | K Birrell | 6 | 6 | ||||||||||||||||||||||
| Q | M Inglis | 3 | 5 | 8 | D Aiava | 1 | 1 | ||||||||||||||||||||
| 8 | D Aiava | 6 | 7 | K Birrell | 6 | 2 | |||||||||||||||||||||
| LL |  M Zakarlyuk | 2 | 77 | 2 | Q | Z Zlochová | 4 | 1r | |||||||||||||||||||
| Q |  I Ramialison | 6 | 65 | 6 | Q | I Ramialison | 4 | 6 | 6 | ||||||||||||||||||
| Z Hives | 6 | 4 | 6 | Z Hives | 6 | 3 | 3 | ||||||||||||||||||||
| H Kuwata | 2 | 6 | 4 | Q | I Ramialison | 5 | 68 | ||||||||||||||||||||
| A Myers | 63 | 1 | Q | Z Zlochová | 7 | 710 | |||||||||||||||||||||
| Q | Z Zlochová | 77 | 6 | Q | Z Zlochová | 6 | 6 | ||||||||||||||||||||
| Q | K Okamura | 6 | 6 | Q | K Okamura | 4 | 0 | ||||||||||||||||||||
| 6 | K Dunne | 4 | 4 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 7 | E Hozumi | 4 | 2 | ||||||||||||||||||||||||
 L Zhang | 6 | 6 | L Zhang | 1 | 6 | 6 | |||||||||||||||||||||
 S Xu | 6 | 78 | S Xu | 6 | 4 | 2 | |||||||||||||||||||||
| E Sema | 2 | 66 | L Zhang | 65 | 3 | ||||||||||||||||||||||
| WC | A Bai | 1 | 3 | E Perez | 77 | 6 | |||||||||||||||||||||
| A Sharma | 6 | 6 | A Sharma | 64 | 1 | ||||||||||||||||||||||
| E Perez | 6 | 63 | 6 | E Perez | 77 | 6 | |||||||||||||||||||||
| 4 | J Fourlis | 4 | 77 | 3 | E Perez | 6 | 6 | ||||||||||||||||||||
| 5 | S-j Jang | 2 | 6 | 3 | WC | N Bains | 2 | 3 | |||||||||||||||||||
 D Gálfi | 6 | 1 | 6 | D Gálfi | 4 | 3 | |||||||||||||||||||||
| WC | N Bains | 6 | 77 | WC | N Bains | 6 | 6 | ||||||||||||||||||||
 A Tere-Apisah | 2 | 63 | WC | N Bains | 65 | 6 | 77 | ||||||||||||||||||||
| H Kaji | 6 | 6 | H Kaji | 77 | 1 | 65 | |||||||||||||||||||||
| WC | K McPhee | 1 | 1 | H Kaji | 6 | 6 | |||||||||||||||||||||
 Y-h Lee | 6 | 6 | Y-h Lee | 3 | 3 | ||||||||||||||||||||||
| 2 | Ar Rodionova | 2 | 4 | ||||||||||||||||||||||||
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